Adds four knowledge base connectors, closing the gap where Sim shipped tool
blocks for these services but could not index their content.
- Bitbucket: repository source files and pull request descriptions over the
existing Bitbucket OAuth credential
- Databricks: notebooks (Workspace API) and saved SQL queries, PAT auth
- Google Chat: spaces indexed as message transcripts, new google-chat OAuth
service under the shared Google client
- Workday Help: knowledge article versions via the public helpArticle/v1 API