fix(rename): second review pass on the package rename

- The post-task reclaim skip recognises the legacy application.* embed name,
  so query embeds queued by the previous release do not pay a full collect.
- The Azure compose file mounts host data on /app/{indexes,inputs,vectors},
  where the process actually reads and writes; it mounted /app/application/...
  before the rename and /app/docsgpt/... after it, and nothing wrote to either.
- The offline image check triggers on docsgpt/requirements*.txt again;
  dependabot's pip entry points at docsgpt/.
- install_hint() and its docstring name docsgpt/requirements-<extra>.txt;
  the test asserts the full path.
- application/vectors/ stays ignored: the compose files still mount it.
- The durability QA script quiets the docsgpt logger tree.
- Upgrade note: the three renamed source-sync entries start their timers
  from the upgrade.

deployment/docker-compose-azure.yaml

@@ -44,12 +44,14 @@ services:
     ports:
       - "7091:7091"
     volumes:
-      # Host data stays under application/ (the old package directory) for this
-      # release so an upgraded checkout keeps its indexes; it moves with the
-      # packaging work, together with an upgrade note.
-      - ../application/indexes:/app/docsgpt/indexes
-      - ../application/inputs:/app/docsgpt/inputs
-      - ../application/vectors:/app/docsgpt/vectors
+      # Host data lives under application/ (the old package directory) for this
+      # release, like the other compose files; it moves with the packaging work,
+      # together with an upgrade note. The container side is /app: the process
+      # runs there and resolves indexes/inputs/vectors relative to it (earlier
+      # versions of this file mounted /app/application/..., which nothing wrote to).
+      - ../application/indexes:/app/indexes
+      - ../application/inputs:/app/inputs
+      - ../application/vectors:/app/vectors
     depends_on:
       redis:
         condition: service_started