Bootstrap the seat mesh-delivery so a runner admits its source before the seat list is read (A-362)

The catalog half is read through mesh-delivery's source as well as mesh-catalog's verbs, and a runner with an unread
seat list admitted only the latter. The bootstrapped copy is mesh-delivery main 21eaa55b's contract file, byte for
byte; the tests' seat list and the captured beside copy take the same file.

Builds: design 47 G lead answers A-362, A-353

Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h

go/seatlist/bootstrap_contracts_test.go

@@ -26,6 +26,7 @@ func TestEveryBootstrappedDefinitionEqualsItsContractsFile(t *testing.T) {
 		{"operator-channel", "mesh-contracts", "operator-and-conversation/seats/operator-channel/seat.json"},
 		{"mesh-catalog", "mesh-delivery", "modules/mesh-delivery-contracts/seats/mesh-catalog/seat.json"},
 		{"mesh-delivery-checker", "mesh-delivery", "modules/mesh-delivery-contracts/seats/mesh-delivery-checker/seat.json"},
+		{"mesh-delivery", "mesh-delivery", "modules/mesh-delivery-contracts/seats/mesh-delivery/seat.json"},
 	}
 	var have []string
 	for _, d := range Bootstrapped() {

go/seatlist/seatlist_test.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"reflect"
+	"slices"
 	"strings"
 	"testing"
 	"time"
@@ -182,6 +183,13 @@ func TestTheBootstrapIsHeldAndNothingNewIsActedOnUntilTheSeatAnswers(t *testing.
 	if got := len(r.Definitions()); got != len(boot) {
 		t.Fatalf("the reader holds %d definitions, the bootstrap has %d", got, len(boot))
 	}
+	// Design 47 G lead answers A-353, A-362: before the list is read the runner admits the seat verbs its catalog half is
+	// read by, mesh-delivery's source beside mesh-catalog's registrations, revision and entry.
+	for _, sv := range [][2]string{{"mesh-catalog", "registrations"}, {"mesh-catalog", "revision"}, {"mesh-catalog", "entry"}, {"mesh-delivery", "source"}} {
+		if !slices.ContainsFunc(r.Definitions()[sv[0]].Verbs, func(v seatdef.Verb) bool { return v.Name == sv[1] }) {
+			t.Errorf("with the seat list unread the reader holds no %s.%s", sv[0], sv[1])
+		}
+	}
 	st := r.Status()
 	if st.Heard || len(st.Waiting) != len(boot) || st.LastError == "" || st.Health() == "" {
 		t.Fatalf("status %+v: want the seat not heard, every bootstrapped seat waiting, the error and the health said", st)

go/seatlist/seatlisttest/seats/mesh-delivery.json

@@ -101,18 +101,15 @@
     },
     {
       "name": "source",
-      "description": "One watched branch's source revision (design 47 *Watched branches and the catalog graph per branch*: source.<branch> in place of source.main): The source revision the gate holds: every repository it names, its trunk branch and that trunk's head as the gate merged or seeded it, and the group that moved it last. Read, never written: the node-engines read it to call a reverted build's catch-up tool once per repository, never the gate's state (design 47).",
+      "description": "One watched branch's source revision (design 47 *Watched branches and the catalog graph per branch*: source.<branch> in place of source.main): The source revision the gate holds: every repository it names, its trunk branch and that trunk's head as the gate merged or seeded it, and the group that moved it last. Read, never written: the node-engines read it to call a reverted build's catch-up tool once per repository, never the gate's state (design 47). Given no branch it answers branches alone, the branch of each source key the gate keeps; given a branch, that branch's source revision (design 47 G section 690).",
       "input": {
         "type": "object",
         "properties": {
           "branch": {
             "type": "string",
-            "description": "the watched branch, escaped as a key name is"
+            "description": "the watched branch, escaped as a key name is; absent: the answer is the list of the branches the gate keeps a source revision of (design 47 G section 690)"
           }
-        },
-        "required": [
-          "branch"
-        ]
+        }
       },
       "answer": {
         "type": "object",
@@ -139,6 +136,13 @@
           "branch": {
             "type": "string",
             "description": "the watched branch the source revision is of"
+          },
+          "branches": {
+            "type": "array",
+            "items": {
+              "type": "string"
+            },
+            "description": "given no branch: the branch name of each source.<branch> key the gate keeps, which every reader of the catalog half follows before the first registrations (design 47 G section 614, section 690)"
           }
         }
       },
@@ -304,6 +308,22 @@
             "type": "boolean",
             "description": "a merge made at the forge, with no Approve"
           },
+          "repository": {
+            "type": "string",
+            "description": "for a forge-made record, the repository, <owner>/<name>"
+          },
+          "pull": {
+            "type": "integer",
+            "description": "for a forge-made record, the pull request's number"
+          },
+          "commit": {
+            "type": "string",
+            "description": "for a forge-made record, the merge commit"
+          },
+          "branch": {
+            "type": "string",
+            "description": "for a forge-made record, the branch the merge moved"
+          },
           "at": {
             "type": "string",
             "format": "date-time",
@@ -429,6 +449,14 @@
             "type": "string",
             "description": "the repository"
           },
+          "module": {
+            "type": "string",
+            "description": "the module the merge changed, from the delivery record"
+          },
+          "branch": {
+            "type": "string",
+            "description": "the watched branch the merge moved"
+          },
           "commit": {
             "type": "string",
             "description": "the merge commit"
@@ -453,6 +481,65 @@
           "why"
         ]
       }
+    },
+    {
+      "name": "approval-carried",
+      "subject": "approval-carried.<repository>.<pull>",
+      "keep": {
+        "max-age-days": 90
+      },
+      "body": {
+        "type": "object",
+        "description": "an Approve given before G, carried as that pull request's approval step: said at G's switch for each merges key the old bridge had not performed (design 47 G 542)",
+        "properties": {
+          "repository": {
+            "type": "string",
+            "description": "the repository"
+          },
+          "pull": {
+            "type": "integer",
+            "description": "the pull request's number",
+            "minimum": 1
+          },
+          "commit": {
+            "type": "string",
+            "description": "the head the Approve named"
+          },
+          "approver": {
+            "type": "string",
+            "description": "who approved: the operator"
+          },
+          "at": {
+            "type": "string",
+            "description": "when it was said, RFC 3339",
+            "format": "date-time"
+          }
+        },
+        "required": [
+          "repository",
+          "pull",
+          "commit",
+          "approver",
+          "at"
+        ]
+      }
+    },
+    {
+      "name": "pins-stated",
+      "body": {
+        "type": "object",
+        "description": "the gate states every pin it holds once its pinned events are said, so an indexer whose state pins was made later hears them all; kept as pinned is, on the seat's family (design 47 G 579, 652)",
+        "properties": {
+          "at": {
+            "type": "string",
+            "description": "when it was said, RFC 3339",
+            "format": "date-time"
+          }
+        },
+        "required": [
+          "at"
+        ]
+      }
     }
   ],
   "states": [
@@ -992,9 +1079,24 @@
         "catalog": {
           "type": "array",
           "items": {
-            "type": "integer"
+            "type": "object",
+            "description": "one catalog graph revision, named by its watched branch and its number on the seat mesh-catalog (revisions are numbered per branch)",
+            "properties": {
+              "branch": {
+                "type": "string",
+                "description": "the watched branch the revision belongs to"
+              },
+              "revision": {
+                "type": "integer",
+                "description": "its number on that branch"
+              }
+            },
+            "required": [
+              "branch",
+              "revision"
+            ]
           },
-          "description": "catalog graph revisions, by their number on the seat mesh-catalog"
+          "description": "catalog graph revisions, by watched branch and number on the seat mesh-catalog"
         },
         "assignment": {
           "type": "array",