[Feature]: PGVector-backed log indexing and search

[deekshithgowda85]

Title: PGVector-backed log indexing and search

Description
Add semantic search for logs using pgvector: store embeddings for log chunks and expose a search endpoint. Include a retention policy and optional memory/size limits for indexing. Optionally summarize long logs with AI before indexing.

Expected outcome

• DB schema changes for deployment_log_vectors.
• Background indexer (Inngest function or worker) that creates embeddings and stores vectors.
• Search API endpoint returning ranked results.

Relevant files

• lib/db.ts
• lib/vector-indexer.ts (new)
• app/api/logs/search/route.ts (new)

[khat190]

Hi @deekshithgowda85! I'm a GSSoC contributor could you assign this to me. Thanks