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>

tests/integration/test_mcp_plugin_tools.py

@@ -60,6 +60,9 @@ def test_docker_and_agent_tools_over_seeded_rows(app):
     host_name, quiet_host = f"dock-{tag}", f"quiet-{tag}"
     web, db_, job, svc = f"web-{tag}", f"db-{tag}", f"job-{tag}", f"svc-{tag}"
     replaced = f"{svc}.1.old"
+    # A service across a deploy (#5468): its live task, and the task the deploy replaced.
+    api = f"api-{tag}"
+    api_live, api_gone = f"{api}.1.{tag}{'a' * 17}", f"{api}.1.{tag}{'b' * 17}"
     removed = f"{svc}.2.gone{tag}"  # a dead task Docker removed: logs and events only
 
     def _ago(minutes):
@@ -105,6 +108,21 @@ def test_docker_and_agent_tools_over_seeded_rows(app):
                     "INSERT INTO docker_logs (id, host_id, container_name, ts, stream, line) "
                     "VALUES (:id, :h, :n, :ts, 'stderr', 'FATAL: cannot open database')"),
                     {"id": str(uuid.uuid4()), "h": hid, "n": removed, "ts": now - timedelta(minutes=13)})
+                await s.execute(container_sql, {
+                    "h": hid, "n": api_live, "cid": uuid.uuid4().hex, "st": "running", "rc": 0,
+                    "started": now - timedelta(minutes=3), "now": now, "health": None,
+                    "exit": None, "proj": None, "svc": api, "task": f"{tag}{'a' * 17}"})
+                await s.execute(text(
+                    "INSERT INTO docker_events (id, host_id, container_name, event, detail, at) "
+                    "VALUES (:id, :h, :n, 'start', '', :at)"),
+                    {"id": str(uuid.uuid4()), "h": hid, "n": api_gone, "at": now - timedelta(minutes=30)})
+                for name, mins, line in ((api_gone, 20, "listening (old image)"),
+                                         (api_live, 2, "listening (new image)")):
+                    await s.execute(text(
+                        "INSERT INTO docker_logs (id, host_id, container_name, ts, stream, line) "
+                        "VALUES (:id, :h, :n, :ts, 'stdout', :line)"),
+                        {"id": str(uuid.uuid4()), "h": hid, "n": name,
+                         "ts": now - timedelta(minutes=mins), "line": line})
                 for i, (stream, line) in enumerate((
                         ("stdout", "starting up"), ("stdout", "connected to db"),
                         ("stderr", "ERROR: 100% of disk_used"), ("stdout", "retrying"),
@@ -218,6 +236,17 @@ def test_docker_and_agent_tools_over_seeded_rows(app):
         with pytest.raises(ValueError, match="may have been removed"):
             await dtools.get_container(f"nothing-{tag}")
 
+        # ── a service's name searches every task it has run (#5468) ─────
+        both = await dtools.search_container_logs(container=api, text="listening")
+        assert [m["line"] for m in both["matches"]] == ["listening (new image)", "listening (old image)"]
+        assert [(m["slot"], m["task_id"]) for m in both["matches"]] == [
+            ("1", f"{tag}{'a' * 17}"), ("1", f"{tag}{'b' * 17}")]
+        assert (both["service"], both["tasks_searched"]) == (api, 2)
+        assert (await dtools.search_container_logs(container=api, host=quiet_host))["matches"] == []
+        # A container's own name still reads as that one container.
+        one = await dtools.search_container_logs(container=api_live)
+        assert [m["line"] for m in one["matches"]] == ["listening (new image)"] and "service" not in one
+
         # ── swarm, disk ────────────────────────────────────────────────────
         sw = await dtools.list_swarm_services(limit=500)
         s = next(x for x in sw["services"] if x["service_name"] == svc)