fix: add missing GITEA_DB_PASSWORD env var for OPC database connection

The dashboard OPC module connects to the Gitea PostgreSQL database
but the deploy.yml workflow and docker run fallback were missing the
GITEA_DB_PASSWORD env var, causing the container to crash on startup
with password authentication failures.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -175,6 +175,7 @@ jobs:
     needs: [backend-tests, frontend-tests]
     env:
       SECRET_KEY: test-secret-key-for-ci-environment-32chars-minimum
+      GITEA_DB_PASSWORD: ${GITEA_DB_PASSWORD}
     container:
       network: gitea_gitea
       options: --add-host=host.docker.internal:host-gateway --dns 192.168.31.1 --dns 8.8.8.8
@@ -278,6 +279,7 @@ jobs:
               -e DOCKER_HOST=tcp://docker-socket-proxy:2375 \
               -e GITEA_URL=http://gitea:3000 \
               -e GITEA_TOKEN=${GITEA_TOKEN} \
+              -e GITEA_DB_PASSWORD=${GITEA_DB_PASSWORD} \
               -e VOLUME_ROOT=/volume1 \
               -e SSH_HOST=host.docker.internal \
               -e SSH_USER=zjgump \