Add Microsoft Teams connector to surfsense

[manojag115]

Description

Add Microsoft Teams connector to surfsense. See below screenshots for celery worker logs and ui being able to search through teams messages
Steps followed:

• Add new connector, choose Teams, follow steps to add, make sure your app on azure gives required permissions for the graph api
• Index Teams connector
• Tested chat, selected teams connector
• Also run the db migration using alembic

Motivation and Context

FIX #147

Screenshots

API Changes

• This PR includes API changes

Change Type

• Bug fix
• [x

] New feature - [ ] Performance improvement - [ ] Refactoring - [ ] Documentation - [ ] Dependency/Build system - [ ] Breaking change - [ ] Other (specify):

Testing Performed

• Tested locally
• Manual/QA verification

Checklist

• Follows project coding standards and conventions
• Documentation updated as needed
• Dependencies updated as needed
• No lint/build errors or new warnings
• All relevant tests are passing

High-level PR Summary

This PR adds a new Microsoft Teams connector to SurfSense, enabling users to connect their Teams workspaces and index messages from channels they have access to. The implementation follows the existing connector pattern with OAuth 2.0 authentication via Microsoft Graph API, secure token encryption and refresh, message indexing with date range filtering, and full integration into the search and chat functionality. Both backend (Python/FastAPI) and frontend (TypeScript/React) components are added, along with a database migration to support the new TEAMS_CONNECTOR enum values.

⏱️ Estimated Review Time: 30-90 minutes

💡 Review Order Suggestion

Order	File Path
1	surfsense_backend/.env.example
2	surfsense_backend/app/config/__init__.py
3	surfsense_backend/app/db.py
4	surfsense_web/contracts/enums/connector.ts
5	surfsense_web/contracts/types/connector.types.ts
6	surfsense_backend/alembic/versions/59_add_teams_connector_enums.py
7	surfsense_backend/app/schemas/teams_auth_credentials.py
8	surfsense_backend/app/routes/teams_add_connector_route.py
9	surfsense_backend/app/connectors/teams_connector.py
10	surfsense_backend/app/connectors/teams_history.py
11	surfsense_backend/app/tasks/connector_indexers/teams_indexer.py
12	surfsense_backend/app/tasks/celery_tasks/connector_tasks.py
13	surfsense_backend/app/routes/search_source_connectors_routes.py
14	surfsense_backend/app/services/connector_service.py
15	surfsense_backend/app/utils/connector_naming.py
16	surfsense_backend/app/utils/periodic_scheduler.py
17	surfsense_backend/app/routes/__init__.py
18	surfsense_backend/app/agents/new_chat/tools/knowledge_base.py
19	surfsense_web/components/assistant-ui/connector-popup/constants/connector-constants.ts
20	surfsense_web/components/assistant-ui/connector-popup/connector-configs/components/teams-config.tsx
21	surfsense_web/components/assistant-ui/connector-popup/connector-configs/index.tsx
22	surfsense_web/components/assistant-ui/connector-popup/utils/connector-document-mapping.ts
23	surfsense_web/contracts/enums/connectorIcons.tsx

[vercel]

@manojag115 is attempting to deploy a commit to the Rohan Verma's projects Team on Vercel.

A member of the Team first needs to authorize it.

[recurseml]

Review by RecurseML

🔍 Review performed on 3c93c74..4532cc3

✨ No bugs found, your code is sparkling clean

✅ Files analyzed, no issues (22)

• surfsense_backend/.env.example
• surfsense_backend/alembic/versions/59_add_teams_connector_enums.py
• surfsense_backend/app/agents/new_chat/tools/knowledge_base.py
• surfsense_backend/app/config/__init__.py
• surfsense_backend/app/connectors/teams_connector.py
• surfsense_backend/app/connectors/teams_history.py
• surfsense_backend/app/db.py
• surfsense_backend/app/routes/__init__.py
• surfsense_backend/app/routes/teams_add_connector_route.py
• surfsense_backend/app/schemas/teams_auth_credentials.py
• surfsense_backend/app/services/connector_service.py
• surfsense_backend/app/tasks/celery_tasks/connector_tasks.py
• surfsense_backend/app/tasks/connector_indexers/teams_indexer.py
• surfsense_backend/app/utils/connector_naming.py
• surfsense_backend/app/utils/periodic_scheduler.py
• surfsense_web/components/assistant-ui/connector-popup/connector-configs/components/teams-config.tsx
• surfsense_web/components/assistant-ui/connector-popup/connector-configs/index.tsx
• surfsense_web/components/assistant-ui/connector-popup/constants/connector-constants.ts
• surfsense_web/components/assistant-ui/connector-popup/utils/connector-document-mapping.ts
• surfsense_web/contracts/enums/connector.ts
• surfsense_web/contracts/enums/connectorIcons.tsx
• surfsense_web/contracts/types/connector.types.ts

[manojag115]

@RecurseML review