Description

This PR adds a connector for Coda, using the Notion connector as a general guide.

General Info

Connector is of type Load and Poll.

1. Coda docs are essentially folders, and treated as such by becoming part of its pages metadata.
2. Page are parsed into Documents
3. Tables are parsed into Documents
4. Formulas are parsed into Documents
5. Controls are parsed into Documents

Page, tables, formulas and controls are related to each other through their metadata.

How Has This Been Tested?

1. Setup Coda account with several templates.
2. run pytest backend/tests/daily/connectors/coda/test_coda_connector.py

/claim #2807

Summary by cubic

Add a Coda connector to ingest docs, pages, and tables with HTML export, batching, polling, and hierarchy-aware paths. Surfaces Coda in the UI with icon and credential support, and adds optional doc_ids/page_ids filtering to limit indexing (Linear #2807).

• New Features

  • Backend: fetch docs/pages/tables; export to HTML with backoff; hierarchy-aware paths; Slim connector.
  • Polling/Validation: full load and time-based polling; optional doc_ids/page_ids filter; /whoami validation; registered DocumentSource.CODA.
  • Client: create_doc and create_page methods.
  • Tests/Web: e2e for load_from_state, poll_source, and slim retrieval; UI adds Coda source, icon, and coda_api_token credential.

• Migration

  • Add a Coda API Token under Credentials > Coda.
  • No config fields required; create a Coda source to start indexing.

^{Written for commit d7e0e94c0ba5f5f1bd10337dccf71447f424fe70. Summary will update automatically on new commits.}