Embedding Migration to Mistral

Google's text-embedding-004 model was deprecated, so VaporLens migrated game embeddings to mistral-embed. This is why no games were processed over the past ~day while the pipeline and database were updated.

What to expect:

• Better similarity quality overall: mistral-embed is more consistent on game-specific language, so similar-game results should improve.
• Slightly different matches: Embeddings changed, so a few neighbors may shift even for familiar titles.

Everything is back online and new games should resume processing as usual.