fix(moments): the tools import the delivery module, and the tool-list cache leaves the swept directory (milestone 458 step 4a, #4922)

Two guards caught 7865313:

- test_mcp_tool_processes reads every coroutine in a tool module's
  namespace as a tool, and a name-imported attach_moment_rules looked
  like one. All seven modules now call moment_delivery.attach_moment_rules,
  and the parity guard accepts the attribute form.
- The session-ledger convention: a file in a swept directory must be a
  .ids ledger. The tool-list cache describes the install, not the
  context, so it moves to its own directory, scribe-moment, where a
  compaction does not sweep it.

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

src/scribe/mcp/tools/processes.py

@@ -14,7 +14,7 @@ from scribe.services import notes as notes_svc
 from scribe.services import systems as systems_svc
 from scribe.services import trash as trash_svc
 from scribe.services.note_usage import record_pulled
-from scribe.services.moment_delivery import attach_moment_rules
+from scribe.services import moment_delivery
 
 
 async def list_processes(
@@ -107,7 +107,7 @@ async def create_process(
     )
     if system_ids:
         await systems_svc.set_record_systems(uid, note.id, system_ids)
-    return await attach_moment_rules(uid, "create_process", {}, note.to_dict())
+    return await moment_delivery.attach_moment_rules(uid, "create_process", {}, note.to_dict())
 
 
 async def get_process(name_or_id: str, project_id: int = 0) -> dict: