DLV-M2: the checker follows the indexer's candidates, modules, manifests, packages and predefined keys and the assigner's placement by first views

ADR 0615 §1 and ADR 0596: the checker invokes the six read tools, consumes their views families and
reads none of the six buckets; this ends its direct read of the packages state (the lead's ruling 2).
It keeps first-views and findings and announces both as its own. The lead's ruling: an owner that is
down never holds the start; the checks, the tries and the hand asks start once every first view is
answered, the placement is followed into the toolchain gate once its first view is. firstview.Reader
opens a followed state's picture as a process.BucketOpener (the builder uses it too). Tools
checker_first_views and checker_first_view_again.

Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig

modules/mesh-delivery-checker/module.json

@@ -17,6 +17,12 @@
     "go-package-registry.published",
     "mesh-build-go.toolchain.reported",
     "mesh-build-node.toolchain.reported",
+    "mesh-delivery-assigner.views.placement",
+    "mesh-delivery-indexer.views.candidates",
+    "mesh-delivery-indexer.views.manifests",
+    "mesh-delivery-indexer.views.modules",
+    "mesh-delivery-indexer.views.packages",
+    "mesh-delivery-indexer.views.predefined",
     "npm-package-registry.published"
   ],
   "streams": [
@@ -30,22 +36,18 @@
     { "name": "owed", "history": 5 },
     { "name": "previews", "history": 5 },
     { "name": "tries", "history": 1 },
-    { "name": "verdicts", "history": 5 }
+    { "name": "verdicts", "history": 5 },
+    { "name": "first-views", "history": 1 },
+    { "name": "findings", "history": 1 }
   ],
   "reads": [
     "mesh-build-go.steps",
     "mesh-build-go.toolchains",
     "mesh-build-node.steps",
     "mesh-build-node.toolchains",
-    "mesh-delivery-assigner.placement",
     "mesh-delivery-builder.builds",
     "mesh-delivery-gate.source",
     "mesh-delivery-gate.turns",
-    "mesh-delivery-indexer.candidates",
-    "mesh-delivery-indexer.manifests",
-    "mesh-delivery-indexer.modules",
-    "mesh-delivery-indexer.packages",
-    "mesh-delivery-indexer.predefined",
     "mesh-delivery-watchman.presence",
     "node-engine.have"
   ],
@@ -59,6 +61,8 @@
     "checker_previews",
     "checker_pull",
     "checker_status",
+    "checker_first_views",
+    "checker_first_view_again",
     "checker_try",
     "checker_try_end",
     "checker_try_read",
@@ -69,6 +73,12 @@
     "gitea.gitea_compare",
     "gitea.gitea_get_file",
     "gitea.gitea_list_branches",
+    "mesh-delivery-assigner.assigner_read_placement",
+    "mesh-delivery-indexer.indexer_read_candidates",
+    "mesh-delivery-indexer.indexer_read_manifests",
+    "mesh-delivery-indexer.indexer_read_modules",
+    "mesh-delivery-indexer.indexer_read_packages",
+    "mesh-delivery-indexer.indexer_read_predefined",
     "seat:node-engine.compose-candidate"
   ],