feat: complete chat sessions and production startup

compose.yaml

@@ -1,6 +1,7 @@
 services:
   db:
     image: pgvector/pgvector:pg16
+    restart: unless-stopped
     environment:
       POSTGRES_DB: wisegrade
       POSTGRES_USER: wisegrade
@@ -13,6 +14,7 @@ services:
       retries: 12
   redis:
     image: redis:7-alpine
+    restart: unless-stopped
   test-db:
     profiles: [test]
     image: pgvector/pgvector:pg16
@@ -52,6 +54,7 @@ services:
     command: ["pytest", "-q"]
   api:
     build: ./backend
+    restart: unless-stopped
     env_file: .env
     volumes: &api-volumes
       - ${WISEGRADE_DATA_DIR}:/data/inbox:ro
@@ -73,14 +76,16 @@ services:
     env_file: .env
     volumes: *api-volumes
     depends_on:
-      db: {condition: service_healthy}
+      api: {condition: service_healthy}
       redis: {condition: service_started}
     command: ["sh", "-c", "rq worker wisegrade --url \"$$REDIS_URL\""]
   web:
     build: ./frontend
+    restart: unless-stopped
     ports:
       - "127.0.0.1:${WISEGRADE_WEB_PORT:-18080}:80"
-    depends_on: [api]
+    depends_on:
+      api: {condition: service_healthy}
     healthcheck:
       test: [CMD, wget, -q, -O, /dev/null, "http://127.0.0.1/health"]
       interval: 10s