End every wait in flight when the tool runner stops (issue 745)

Closing the console shut its server down with a context that never ends, so a stop or restart of
the tool runner waited on any mesh_wait in flight for up to ten minutes. The server's base context
is now cancelled first, ending every wait at once, with a five-second shutdown as a backstop
(second review of issue 745).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

node-tools/internal/console/address.go

@@ -2,8 +2,8 @@ package console
 
 // The mesh's tools found by address, not announced whole (novox/hq ADR 0195, to-be 34 §3a).
 //
-// The console announces six tools — five to find and call, and mesh_runtimes to say which runtimes
-// discovery heard. Everything the mesh answers is reached through them by one address per layer:
+// The console announces seven tools — five to find and call, mesh_runtimes to say which runtimes
+// discovery heard, and mesh_wait to wait on the bus for an event (novox/hq ADR 0367). Everything the mesh answers is reached through them by one address per layer:
 //
 //	<seat>.<verb>              a seat held once for the mesh — its holder answers
 //	<node>/<seat>.<verb>       a seat held once per machine — that machine's holder answers
@@ -17,6 +17,7 @@ package console
 // session — so a tool that arrived a minute ago is found without the client reconnecting.
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"sort"
@@ -32,7 +33,7 @@ import (
 // one agent turn's search, describe and call ask once, short enough that nothing goes stale.
 var IndexKept = 5 * time.Second
 
-// The six tools the console announces. Names of the API's kind — letters, digits, `_`, `-`.
+// The seven tools the console announces. Names of the API's kind — letters, digits, `_`, `-`.
 const (
 	verbOverview = "mesh_overview"
 	verbMachine  = "mesh_machine"
@@ -40,6 +41,7 @@ const (
 	verbDescribe = "mesh_describe"
 	verbCall     = "mesh_call"
 	verbRuntimes = "mesh_runtimes"
+	verbWait     = "mesh_wait"
 )
 
 // searchCap is how many matches a search answers before it says how many more there were.
@@ -50,7 +52,7 @@ const grammar = "Addresses: `<seat>.<verb>` for a seat held once for the mesh (e
 	"`<node>/<module>.<tool>` for a module on one machine (e.g. `novox/postgres.postgres_list_databases`); " +
 	"and `<module>.<tool>` also for a module whose instances are interchangeable."
 
-// discovery is the six tools as tools/list announces them.
+// discovery is the seven tools as tools/list announces them.
 func discovery() []map[string]any {
 	str := func(desc string) map[string]any { return map[string]any{"type": "string", "description": desc} }
 	obj := func(props map[string]any, required ...string) map[string]any {
@@ -84,12 +86,13 @@ func discovery() []map[string]any {
 				"arrive, its size in bytes, how many modules and tools it announced, whether it was shortened to fit the " +
 				"bus, and when it was last heard — and every runtime or machine expected that was not heard. Read-only; " +
 				"for when an address is said to be missing or on another machine."},
+		waitTool(),
 	}
 }
 
 func isDiscovery(name string) bool {
 	switch name {
-	case verbOverview, verbMachine, verbSearch, verbDescribe, verbCall, verbRuntimes:
+	case verbOverview, verbMachine, verbSearch, verbDescribe, verbCall, verbRuntimes, verbWait:
 		return true
 	}
 	return false
@@ -815,10 +818,13 @@ func failure(text string) map[string]any {
 }
 
 // discover answers one of the discovery verbs.
-func (s *Surface) discover(name string, args map[string]any) map[string]any {
+func (s *Surface) discover(ctx context.Context, name string, args map[string]any) map[string]any {
 	if name == verbRuntimes {
 		return s.runtimesAnswer()
 	}
+	if name == verbWait {
+		return s.waitAnswer(ctx, args)
+	}
 	x, err := s.index()
 	if err != nil {
 		return failure("the mesh's discovery failed: " + err.Error())