fix: avoid postgres port collisions in workflow

.github/workflows/python-uv-ci-with-db.yml

@@ -101,7 +101,7 @@ jobs:
           POSTGRES_PASSWORD: ${{ inputs.postgres_password }}
           POSTGRES_DB: ${{ inputs.postgres_db }}
         ports:
-          - 5432:5432
+          - 5432
         options: >-
           --health-cmd="${{ inputs.postgres_health_cmd }}"
           --health-interval=${{ inputs.postgres_health_interval }}
@@ -114,6 +114,13 @@ jobs:
           --health-interval=${{ inputs.redis_health_interval }}
           --health-timeout=${{ inputs.redis_health_timeout }}
           --health-retries=${{ inputs.redis_health_retries }}
+    env:
+      POSTGRES_HOST: 127.0.0.1
+      POSTGRES_PORT: ${{ job.services.postgres.ports['5432'] }}
+      POSTGRES_USER: ${{ inputs.postgres_user }}
+      POSTGRES_PASSWORD: ${{ inputs.postgres_password }}
+      POSTGRES_DB: ${{ inputs.postgres_db }}
+      DATABASE_URL: postgres://${{ inputs.postgres_user }}:${{ inputs.postgres_password }}@127.0.0.1:${{ job.services.postgres.ports['5432'] }}/${{ inputs.postgres_db }}
     permissions:
       contents: read
     defaults: