feat(v1.1.6): realtime channels + v1.1.5 follow-ups + version bumps

Server-side realtime SSE on per-app pub/sub topics, plus the three
v1.1.5 follow-ups and the version bumps.

Realtime:
- topics registry (0021) + admin endpoints + Capability::AppTopicManage
  (-> app:admin; no new scope).
- GET /realtime/topics/{topic} SSE endpoint (orchestrator-core data
  plane): Host -> app, RealtimeAuthority gate (404 missing/internal,
  401 bad/absent token), broadcast::Receiver stream + heartbeat.
- RealtimeBroadcaster / RealtimeEvent / RealtimeAuthority traits
  (picloud-shared); InProcessBroadcaster + GC (orchestrator-core);
  DB-backed RealtimeAuthorityImpl (manager-core). Publish path fans out
  to in-process subscribers after the durable outbox commit (best-effort,
  panic-isolated).
- HMAC subscriber tokens (subscriber_token.rs) + app_secrets table (0022)
  + pubsub::subscriber_token SDK (schema 1.6 -> 1.7). TTL clamp + env
  overrides.
- Dashboard Topics tab (register/list/edit/delete, prominent external
  badge, flip confirmation).

v1.1.5 follow-ups:
- Empty blobs accepted (NewFile/FileUpdate::validate) + round-trip test.
- Orphan *.tmp.* sweeper (spawn_files_orphan_sweep).
- Dispatcher e2e tests, one per trigger kind (DATABASE_URL-gated).

Versions: workspace 1.1.6, SDK 1.7, dashboard 0.12.0. Schema-snapshot
golden re-blessed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

crates/manager-core/tests/expected_schema.txt

@@ -58,6 +58,12 @@ table: app_members
   role: text NOT NULL
   created_at: timestamp with time zone NOT NULL default=now()
 
+table: app_secrets
+  app_id: uuid NOT NULL
+  realtime_signing_key: bytea NOT NULL
+  created_at: timestamp with time zone NOT NULL default=now()
+  updated_at: timestamp with time zone NOT NULL default=now()
+
 table: app_slug_history
   slug: text NOT NULL
   current_app_id: uuid NOT NULL
@@ -211,6 +217,14 @@ table: scripts
   app_id: uuid NOT NULL
   kind: text NOT NULL default='endpoint'::text
 
+table: topics
+  app_id: uuid NOT NULL
+  name: text NOT NULL
+  external_subscribable: boolean NOT NULL default=false
+  auth_mode: text NOT NULL default='public'::text
+  created_at: timestamp with time zone NOT NULL default=now()
+  updated_at: timestamp with time zone NOT NULL default=now()
+
 table: triggers
   id: uuid NOT NULL default=gen_random_uuid()
   app_id: uuid NOT NULL
@@ -256,6 +270,9 @@ indexes on app_members:
   app_members_pkey: public.app_members USING btree (app_id, user_id)
   app_members_user_id_idx: public.app_members USING btree (user_id)
 
+indexes on app_secrets:
+  app_secrets_pkey: public.app_secrets USING btree (app_id)
+
 indexes on app_slug_history:
   app_slug_history_pkey: public.app_slug_history USING btree (slug)
 
@@ -328,6 +345,9 @@ indexes on scripts:
   scripts_name_uidx: public.scripts USING btree (app_id, lower(name))
   scripts_pkey: public.scripts USING btree (id)
 
+indexes on topics:
+  topics_pkey: public.topics USING btree (app_id, name)
+
 indexes on triggers:
   idx_triggers_app_kind_enabled: public.triggers USING btree (app_id, kind) WHERE (enabled = true)
   idx_triggers_app_pubsub_enabled: public.triggers USING btree (app_id, kind) WHERE ((enabled = true) AND (kind = 'pubsub'::text))
@@ -366,6 +386,10 @@ constraints on app_members:
   [FOREIGN KEY] app_members_user_id_fkey: FOREIGN KEY (user_id) REFERENCES admin_users(id) ON DELETE CASCADE
   [PRIMARY KEY] app_members_pkey: PRIMARY KEY (app_id, user_id)
 
+constraints on app_secrets:
+  [FOREIGN KEY] app_secrets_app_id_fkey: FOREIGN KEY (app_id) REFERENCES apps(id) ON DELETE CASCADE
+  [PRIMARY KEY] app_secrets_pkey: PRIMARY KEY (app_id)
+
 constraints on app_slug_history:
   [FOREIGN KEY] app_slug_history_current_app_id_fkey: FOREIGN KEY (current_app_id) REFERENCES apps(id) ON DELETE CASCADE
   [PRIMARY KEY] app_slug_history_pkey: PRIMARY KEY (slug)
@@ -448,6 +472,11 @@ constraints on scripts:
   [FOREIGN KEY] scripts_app_id_fk: FOREIGN KEY (app_id) REFERENCES apps(id) ON DELETE RESTRICT
   [PRIMARY KEY] scripts_pkey: PRIMARY KEY (id)
 
+constraints on topics:
+  [CHECK] topics_auth_mode_check: CHECK ((auth_mode = ANY (ARRAY['public'::text, 'token'::text])))
+  [FOREIGN KEY] topics_app_id_fkey: FOREIGN KEY (app_id) REFERENCES apps(id) ON DELETE CASCADE
+  [PRIMARY KEY] topics_pkey: PRIMARY KEY (app_id, name)
+
 constraints on triggers:
   [CHECK] triggers_dispatch_mode_check: CHECK ((dispatch_mode = ANY (ARRAY['sync'::text, 'async'::text])))
   [CHECK] triggers_kind_check: CHECK ((kind = ANY (ARRAY['kv'::text, 'dead_letter'::text, 'docs'::text, 'cron'::text, 'files'::text, 'pubsub'::text])))
@@ -478,3 +507,5 @@ constraints on triggers:
   0018: files
   0019: files triggers
   0020: pubsub triggers
+  0021: topics
+  0022: app secrets