feat(skill-catalog-subscription): synced catalog + HTTP sync + MCP tools

Consumes the external Subscription Platform as source of truth for skill
content; reuses skills_learning domain models (extended with KnowledgeSkill)
and workflow.skill_exec resolver. HTTP/MCP deps land in api/ per
CONSTITUTION.md; synced skills use a physically separate SQLite file
(tasks/skills.sqlite3) to preserve the skill-authoring capability boundary.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

api/mcp.py

@@ -92,7 +92,12 @@ def tool_handlers(
     }
 
 
-def create_mcp_server(*, manager: DeviceManager | None = None) -> Any:
+def create_mcp_server(
+    *,
+    manager: DeviceManager | None = None,
+    skill_catalog_store: Any | None = None,
+    skill_active_subscriptions: set[str] | None = None,
+) -> Any:
     try:
         from mcp.server.fastmcp import FastMCP
     except ImportError as exc:
@@ -159,4 +164,14 @@ def create_mcp_server(*, manager: DeviceManager | None = None) -> Any:
     def _device_status(device_id: str) -> dict[str, Any]:
         return handlers["device_status"](device_id=device_id)
 
+    if skill_catalog_store is not None:
+        from api.skill_catalog_mcp import register_skill_catalog_tools
+
+        register_skill_catalog_tools(
+            server,
+            store=skill_catalog_store,
+            get_active_subscriptions=lambda: set(skill_active_subscriptions or set()),
+            get_registered_tools=lambda: set(handlers.keys()),
+        )
+
     return server