Fit & finish: Multi-User Khoj application

[x] Remove exposed API endpoints that should not be accessible in a cloud environment (for example, offline chat)
[x] Add clear onboarding instructions
[x] Add billing with a callback function to determine which users are subscribed
[x] Need a copy button by the API Key
[x] Remove trailing slash from the URL in the desktop application
[x] Update copy after you've saved a setting in the config page. (doesn't need to say go back to settings page)
[x] Prompt exceeded error with gpt4
[x] zoneinfo._common.ZoneInfoNotFoundError: 'tzlocal() does not support non-zoneinfo timezones like UTC. \nPlease use a timezone in the form of Continent/City'
[x] Account icon on the config page
[x] Add ability to delete indexed data from the web app settings page
[x] Remove @auth_router.post("/redirect") from generate_token API (overrides actual redirect login method)
[x] Remove demo backend code/configuration
[x] Ensure search results are same before vs after rearchitecture
- Search results are deterministic for a given model and dataset
[X] Rename Embeddings to Entries
[x] Improve Sign-In UX on Web App
[x] Add unit test to prevent cross-shard access
- Ensure access to DB from API controllers only via wrapper function that need user argument. Do not work directly with Django DB models
[x] Test Performance of Khoj at scale
- How much users * data can be ingested. It's effects on memory utilization and search, chat latency.
[x] Starting khoj with the khoj is broken. Need it to call run(should_start_server=True) but it's doing run(should_start_server=False) in main.py final conditional. This is required for gunicorn. Using env variable to select between the two may be the fix for this
[x] Multiple API calls landing together maybe duplicate results duplicate. Keep per user write lock in DB to prevent this

khoj-ai / khoj

Fit & finish: Multi-User Khoj application #527