[INT-008] Google Docs Pipeline Integration

[quaid]

Story

As a user, I need Google Docs content to flow through the style adaptation pipeline so that I can fetch docs, adapt their style, and push back.

Acceptance Criteria

• API endpoint: POST /api/v1/connectors/gdocs/fetch - fetch document
• API endpoint: POST /api/v1/connectors/gdocs/adapt - fetch, adapt, return
• API endpoint: POST /api/v1/connectors/gdocs/push - push adapted content
• API endpoint: POST /api/v1/connectors/gdocs/sync - full round-trip
• Integration with StyleAdapter for style transformation
• On-demand triggering
• Integration tests for full pipeline

Technical Notes

• Follow same pattern as Strapi pipeline integration
• Respect tenant isolation throughout
• Handle Google API quotas gracefully

Dependencies

• INT-007 (Google Docs Connector Service)

Points: 2
Type: Feature
Branch: feature/INT-008