chore(deps): update cloudamqp/lavinmq docker tag to v2.7.0 (#260)

## Summary

- Remove the 600Mi memory limit on the local Postgres Deployment. With `shared_buffers=384MB` + `max_connections=300` the pod was being repeatedly OOMKilled under real workloads, leaving clients with intermittent `connect: connection refused`. Keep the 400Mi request for scheduling.
- Add `document` to the seeded database list in `initdb.sh`.

## Test plan

- [x] `kubectl --context kind-unbound apply -f k8s/infra/postgres.yaml` — rollout succeeds
- [x] Postgres pod stable (0 restarts) after apply
- [ ] On a fresh cluster (`./setup`), verify the `document` database is created (requires empty `data/postgres/`)

Reviewed-on: #259

.gitignore

@@ -1,3 +1,3 @@
 data
 charts
-.claude/
+.claude/settings.local.json

k8s/infra/lavinmq.yaml

@@ -28,7 +28,7 @@ spec:
         app.kubernetes.io/name: lavinmq
     spec:
       containers:
-      - image: cloudamqp/lavinmq:2.6.10@sha256:e52866d61141b3bb61a3ae99acd7fac1c750ba86af50037864f9498c27fbd89a
+      - image: cloudamqp/lavinmq:2.7.0@sha256:521d49d60819a739f9323db47accb248502fca7bf79c9e0539e7b23a12e1413d
         imagePullPolicy: Always
         livenessProbe:
           tcpSocket:

k8s/infra/postgres.yaml

@@ -23,6 +23,7 @@ data:
     	CREATE DATABASE authz WITH OWNER postgres ENCODING utf8;
     	CREATE DATABASE company WITH OWNER postgres ENCODING utf8;
     	CREATE DATABASE consumer WITH OWNER postgres ENCODING utf8;
+    	CREATE DATABASE document WITH OWNER postgres ENCODING utf8;
     	CREATE DATABASE employee WITH OWNER postgres ENCODING utf8;
     	CREATE DATABASE invoice WITH OWNER postgres ENCODING utf8;
     	CREATE DATABASE notification WITH OWNER postgres ENCODING utf8;
@@ -52,7 +53,7 @@ spec:
     spec:
       containers:
       - name: postgres
-        image: postgres:18.3-alpine@sha256:4da1a4828be12604092fa55311276f08f9224a74a62dcb4708bd7439e2a03911
+        image: postgres:18.3-alpine@sha256:52098013b4b64a746626437d38afc03cabff6cdeb4d3d92e2342aa95f0ce56ea
         args:
         - -c
         - shared_buffers=384MB
@@ -62,8 +63,6 @@ spec:
         resources:
           requests:
             memory: 400Mi
-          limits:
-            memory: 600Mi
         ports:
         - containerPort: 5432
         env: