Update PostgreSQL volume mount paths for PostgreSQL 18 (#16986)

* Initial plan

* Update PostgreSQL volume mount paths for PostgreSQL 18 compatibility

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

compose.local-db.yml

@@ -21,7 +21,7 @@ services:
     env_file:
       - .config/docker.env
     volumes:
-      - ./db:/var/lib/postgresql/data
+      - ./db:/var/lib/postgresql
     healthcheck:
       test: "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"
       interval: 5s

compose_example.yml

@@ -43,7 +43,7 @@ services:
     env_file:
       - .config/docker.env
     volumes:
-      - ./db:/var/lib/postgresql/data
+      - ./db:/var/lib/postgresql
     healthcheck:
       test: "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"
       interval: 5s

packages/backend/test-federation/compose.a.yml

@@ -50,7 +50,7 @@ services:
     volumes:
       - type: bind
         source: ./volumes/db.a
-        target: /var/lib/postgresql/data
+        target: /var/lib/postgresql
         bind:
           create_host_path: true
 

packages/backend/test-federation/compose.b.yml

@@ -50,7 +50,7 @@ services:
     volumes:
       - type: bind
         source: ./volumes/db.b
-        target: /var/lib/postgresql/data
+        target: /var/lib/postgresql
         bind:
           create_host_path: true