feat(mcp): search_container_logs takes a Swarm service's name and searches every task it has run (#5468)

#5468 "Log search by service name: searching "steward_app" refuses because every
deploy makes a new container name".

search_container_logs(container="steward_app") was refused, because no container
carries the service's own name and five task containers partly matched. Now a
service's name reaches every task container Steward holds anything for, live and
removed (docker_svc.service_containers, as the service page's logs already do),
so one search spans deploys. Each match carries the slot and task_id that wrote
it, and the reply names the service and how many tasks were searched. A container
named exactly what was asked still takes precedence. A miss that partly matches
task containers now names their services.

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

plugins/docker/service.py

@@ -356,9 +356,12 @@ def scaled_bars(values: list, floor: float) -> dict:
 
 
 async def search_logs(db, *, since, host_id: str | None = None, name: str | None = None,
+                      containers: list[tuple[str, str]] | None = None,
                       text: str = "", stream: str = "", before=None, limit: int = 50) -> list:
     """Retained log lines matching a filter, newest first (limit + 1 fetched by callers
-    that need to know whether more exist)."""
+    that need to know whether more exist). `containers` keeps the lines of those
+    (host_id, container_name) pairs: a swarm service's tasks (#5468)."""
+    from sqlalchemy import tuple_
     stmt = (select(DockerLog.id, DockerLog.host_id, DockerLog.container_name,
                    DockerLog.ts, DockerLog.stream, DockerLog.line)
             .where(DockerLog.ts >= since))
@@ -366,6 +369,10 @@ async def search_logs(db, *, since, host_id: str | None = None, name: str | None
         stmt = stmt.where(DockerLog.host_id == host_id)
     if name:
         stmt = stmt.where(DockerLog.container_name == name)
+    if containers is not None:
+        if not containers:
+            return []
+        stmt = stmt.where(tuple_(DockerLog.host_id, DockerLog.container_name).in_(containers))
     if stream in ("stdout", "stderr"):
         stmt = stmt.where(DockerLog.stream == stream)
     if text: