Continue reindexes all docs on every startup

[shssoichiro]

Before submitting your bug report

• [x] I believe this is a bug. I'll try to join the Continue Discord for questions
• [x] I'm not able to find an open issue that reports the same bug
• [x] I've seen the troubleshooting guide on the Continue Docs

Relevant environment info

- OS: All
- Continue version: Latest stable
- IDE version: Latest VSCode and IntelliJ
- Model: nomic-embed-text
- config: https://hub.continue.dev/expedientfalcon/expedientfalcon-versatile

Description

Every time I start either VSCode or IntelliJ, Continue clears all my previous Docs indexes and reindexes all of them from scratch. This seems completely unnecessary and wastes my CPU/GPU power. Continue needs to be able to skip re-indexing if a site is already in the local Lancedb index for a given model.

To reproduce

1. Have a moderate number of docs
2. Restart your IDE
3. Look at Docs tab
4. See that they are all reindexing from scratch

Log output