plex, redis: module runtime containers + declare self-consumed events (ADR 0052/0046)

plex gains a broker-bound tools/events runtime container (mesh-runtime-plex)
alongside its server, and a never-throwing plex_reachable health probe. redis and
postgres subscribe to their own lifecycle events in index.ts but declared no
consumes — so the substrate never made the queue the runtime binds and it crashed
on start (404). Declare the consume, as ADR 0046 requires. Proven end-to-end in the
mesh-lab: assigned-plex and assigned-redis both green.

Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF

modules/plex/tools/index.ts

@@ -20,6 +20,12 @@ export function getPlexTools(plex: PlexClient): ToolDefinition[] {
         return { server, libraries, sessions, recentlyAdded: recent };
       },
     },
+    {
+      name: "plex_reachable",
+      description: "Health probe: whether the Plex server answers, and which server it is. Never fails.",
+      input: {},
+      run: async () => plex.reachable(),
+    },
     {
       name: "plex_search",
       description: "Search across all Plex libraries — movies, shows, episodes, music.",