Feature/ap 4 airtable connection

[AlexVOiceover]

Summary

Set up Airtable API integration and verify read/write access to the Learners base.

Changes

• Add airtable SDK dependency
• Add dotenv and tsx dev dependencies for running test scripts
• Create scripts/test-airtable.ts to verify API connection
• Update .env.example with Airtable environment variables

Environment Variables Added

• AIRTABLE_API_KEY - Personal access token
• AIRTABLE_BASE_ID_LEARNERS - Learners base
• AIRTABLE_BASE_ID_FEEDBACK - Learner Feedback base

Testing

npx tsx scripts/test-airtable.ts

Verifies:

• ✅ Write access (creates test record)
• ✅ Read access (retrieves records)
• ✅ Delete access (cleans up test record)