docs(architecture): adopt inline synchronous ingestion (ADR-0017)

Why:
- ingestion is inline in the request instead of dispatched through RabbitMQ/outbox/worker; ADR-0014 is superseded (not deleted) and named as the design to adopt once ingestion needs to move off the request path.

Changes:
- new ADR-0017 plus amendments to every ADR/plan that referenced the job-shaped/broker contract, so none silently contradict it.

Impact:
- no broker, outbox, or worker code; rabbitmq test marker removed.

docs/adr/0012-application-resource-lifetime-and-dependency-ownership.md

@@ -165,6 +165,7 @@ Avoid hidden global access:
 # Do not do this.
 session = SessionLocal()
 
+
 async def create_user(data: CreateUserRequest) -> User:
     session.add(User(email=data.email))
     await session.commit()
@@ -206,8 +207,7 @@ async def get_point(
     qdrant: QdrantClient,
     auth: AuthContext,
     point_id: str,
-) -> PointResponse:
-    ...
+) -> PointResponse: ...
 ```
 
 Do not have lower layers import mutable resource singletons. Explicit parameters