Phase 5: Query Engine

[anuragShingare30]

parent issue #21

Objective

Add query endpoint, metadata lookup and Batch fetch + filter

Tasks

• Create POST /query handler
• Parse filters: time range, service, level, keyword
• Query log_batches table for matching o3_object_key values
• Filter by project, time, service, level
• Fetch matching batches from Akave O3 via GetObject
• Decompress in memory
• Apply keyword/field filters
• Stream results to client (SSE or chunked JSON)