fix(ci): resolve Python SDK and dashboard build failures

[Copilot]

📋 Description

Fixes four build/test failures preventing CI from passing on main.

• Python SDK — missing python-dotenv dep: config.py imports from dotenv import load_dotenv but the package wasn't declared in pyproject.toml
• Python SDK — langchain fallback imports incomplete: except ImportError block only stubbed BaseChatMessageHistory and BaseRetriever, leaving BaseMessage, HumanMessage, AIMessage, Document, CallbackManagerForRetrieverRun undefined → NameError at import
• Python SDK — sqlite3.Row has no .get(): compute_tag_match_score called mem.get("tags") on Row objects, failing all three omnibus tests with AttributeError
• Dashboard — Google Fonts unreachable in Docker/CI: next/font/google fetches fonts at build time; replaced with local geist npm package via geist/font/sans and geist/font/mono

🔄 Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🎨 Style/UI changes
• ♻️ Code refactoring
• ⚡ Performance improvements
• 🧪 Test updates
• 🔧 Build/CI changes

🧪 Testing

• I have tested this change locally
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Verified:

• npm run build passes for both packages/openmemory-js and dashboard
• npx tsx tests/test_omnibus.ts — all phases pass
• pytest tests/test_omnibus.py -v — 3/3 pass (previously 0/3)

📱 Screenshots (if applicable)

N/A

🔍 Code Review Checklist

• Code follows the project's coding standards
• Self-review of the code has been performed
• Code is properly commented, particularly in hard-to-understand areas
• Changes generate no new warnings
• Any dependent changes have been merged and published

🚀 Deployment Notes

Dashboard now uses the geist npm package for fonts instead of runtime Google Fonts fetching. Font rendering is identical — same Geist typeface, just bundled locally.

📋 Additional Context

The sqlite3.Row fix uses bracket access with try/except (KeyError, IndexError) rather than converting rows to dicts, keeping it consistent with the existing Row-based access pattern throughout the codebase.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• fonts.googleapis.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/OpenMemory/OpenMemory/dashboard/node_modules/.bin/next build (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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