Automate ER diagram generation and chain docs deployment

[monodera]

Summary

• test_database.yml: automatically generate tbls and SchemaCrawler ER diagrams after schema creation; commit results to docs/tbls/ and diagrams/ on push events
• test_database.yml: add paths-ignore for diagrams/** and docs/tbls/** to prevent an infinite loop triggered by the diagram commit
• deploy_docs_github_pages.yml: add workflow_run trigger so documentation is deployed automatically after the Test Database workflow completes
• diagrams/: remove 21 legacy timestamped PDF files and replace with .gitkeep; CI will now manage erdiagram_targetdb_latest.pdf going forward

Workflow

push to main
  └─→ Test Database workflow starts
        ├─ run tests
        ├─ tbls diagram → docs/tbls/
        ├─ SchemaCrawler diagram → diagrams/erdiagram_targetdb_latest.pdf
        └─ git commit + push [skip ci]
  └─→ Test Database completes → Deploy Documentation triggered via workflow_run
        └─ MkDocs build → GitHub Pages deploy

Test plan

• Confirm test_database.yml completes successfully after merge
• Confirm docs/tbls/ Markdown files are updated in the diagram commit
• Confirm diagrams/erdiagram_targetdb_latest.pdf is generated and committed
• Confirm deploy_docs_github_pages.yml is triggered via workflow_run and GitHub Pages is updated

🤖 Generated with Claude Code

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

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