test: lift coverage 41% → 76% (+1068 tests across 36 files)

Service-level tests now exercise provider, permissions, project, journal,
messaging, work_session, metrics, kanban, extraction, learning, notification,
dashboard, llm_routing, a2a, task, repository_base, audit, db_seed,
branch_name, indexed_document, query_helpers, agent. API route tests cover
provider, journal, project, sessions, dashboard, work_session, tasks, a2a,
groups, notifications, agents, channels, messages, kanban, api_resources.
Pure-function helpers covered: handlers, deps_helpers, middleware,
middleware_docs, transcription, pr templates, agents_config, errors,
logging, journal/notification/channel/a2a access, task_lifecycle,
streaming, converters, crypto, schemas (common + websocket), events,
permissions extras.

pyproject ruff per-file-ignores extended for tests so PLR2004 (status code
magic values), PLC0415 (lazy imports), PLR0913 (fixture params), ARG001
(unused fixture deps), SIM105, and E501 don't fight test idioms.

tests/integration/test_dashboard_routes.py

@@ -12,7 +12,7 @@ from httpx import ASGITransport, AsyncClient
 from roboco.api.deps import get_agent_context, get_db
 from roboco.api.routes.dashboard import router as dashboard_router
 from roboco.db.tables import AgentTable
-from roboco.models import AgentRole, AgentStatus, Team
+from roboco.models import AgentRole, AgentStatus
 from roboco.models.permissions import AgentContext
 from roboco.services.dashboard import reset_storage
 
@@ -83,9 +83,7 @@ async def test_create_auditor_flag(dashboard_client: AsyncClient) -> None:
 
 @pytest.mark.asyncio
 async def test_get_auditor_flags(dashboard_client: AsyncClient) -> None:
-    response = await dashboard_client.get(
-        "/api/dashboard/auditor/flags", headers=_HDR
-    )
+    response = await dashboard_client.get("/api/dashboard/auditor/flags", headers=_HDR)
     assert response.status_code == 200
     assert isinstance(response.json(), list)
 
@@ -154,16 +152,12 @@ async def test_get_kanban_for_team_known_bug(
     raising AttributeError. We assert the bug exists so a fix flips the test.
     """
     with pytest.raises(AttributeError, match="'str' object has no attribute 'value'"):
-        await dashboard_client.get(
-            "/api/dashboard/kanban/backend", headers=_HDR
-        )
+        await dashboard_client.get("/api/dashboard/kanban/backend", headers=_HDR)
 
 
 @pytest.mark.asyncio
 async def test_get_all_agent_status(dashboard_client: AsyncClient) -> None:
-    response = await dashboard_client.get(
-        "/api/dashboard/agents/status", headers=_HDR
-    )
+    response = await dashboard_client.get("/api/dashboard/agents/status", headers=_HDR)
     assert response.status_code == 200