fix: clear 55 pre-existing test failures uncovered after Wave A landed

Three classes of failure, all surfaced once Wave A's plan-required gate
and the migration 013 went in. Per project standing rule: pre-existing
errors are not a free pass — fix them.

1. Wave A1 ordering (32 lifecycle parity failures + 1 full-pipe test).
   _pm_sub_tasks_gate fired BEFORE _claim_plan_start_gate, so wrong-state
   PMs got `incomplete_input` (the gate's verdict) when the spec's
   lifecycle gate should have returned `invalid_state` first. Swapped:
   re-entry check → spec lifecycle gate → sub_tasks gate → claim_plan_run.
   Parity test now sees the spec's verdict as expected.

2. E2 enum naming (2 migration_013 failures + ripple).
   _str_enum in roboco/db/tables.py didn't pass name=… to SQLAlchemy
   Enum(...), so Base.metadata.create_all in test setup inferred
   `role` from the Python class `Role` while the alembic migrations
   declare `agentrole`. Tests saw two enums for the same class and
   hit `agentrole = role` operator errors. Fixed: default name to
   lower(class_name) (matches every migration), override `Role` →
   `agentrole`. One dict entry; no class-by-class registration needed.

3. _MockContentActions.note() signature drift.
   Wave 2 G4 added `structured` kwarg to ContentActions.note().
   The integration mock at tests/integration/v2/test_full_pending_to_completed.py
   didn't accept the new kwarg → 1 test failed on the very first call
   from the v2 do/note route. Added `structured: object = None` and
   left it unused (the test asserts lifecycle, not journal rendering).

Plus three ruff E501 line-length fixes in the test files I touched.

Quality: ruff + mypy clean. pytest 6690 passed / 0 failed / 274 skipped.

tests/unit/gateway/test_choreographer_pm_extras.py

@@ -218,7 +218,9 @@ async def test_i_will_plan_rejects_non_pending_state() -> None:
     pm_id = uuid4()
     task_id = uuid4()
     task_svc = AsyncMock()
-    task_svc.get.return_value = MagicMock(id=task_id, status="in_progress", assigned_to=uuid4())
+    task_svc.get.return_value = MagicMock(
+        id=task_id, status="in_progress", assigned_to=uuid4()
+    )
     task_svc.agent_for.return_value = MagicMock(role="cell_pm", team="backend")
     deps = _make_deps(task=task_svc)
     c = Choreographer(deps)
@@ -392,8 +394,13 @@ async def test_i_will_plan_idempotent_when_already_in_progress_for_caller() -> N
         task_id,
         plan="re-entry plan",
         rich_plan={
-            "approach": "Idempotent re-entry: task already in progress, refresh heartbeat.",
-            "sub_tasks": [{"title": "Re-entry subtask", "description": "Resume work"}],
+            "approach": (
+                "Idempotent re-entry: task already in progress, "
+                "refresh heartbeat."
+            ),
+            "sub_tasks": [
+                {"title": "Re-entry subtask", "description": "Resume work"}
+            ],
         },
     )
 
@@ -451,8 +458,13 @@ async def test_i_will_plan_recovery_when_already_claimed_for_caller() -> None:
         task_id,
         plan="re-entry plan",
         rich_plan={
-            "approach": "Recovery re-entry: task claimed but not started; run set_plan + start.",
-            "sub_tasks": [{"title": "Recovery subtask", "description": "Resume from claimed"}],
+            "approach": (
+                "Recovery re-entry: task claimed but not started; "
+                "run set_plan + start."
+            ),
+            "sub_tasks": [
+                {"title": "Recovery subtask", "description": "Resume from claimed"}
+            ],
         },
     )