LFX Object Store Design

Central explainer for adding object storage capability to an LFX V2 service. Covers the S3-compatible storage decision, hard requirements (no presigned uploads, private buckets only, 20 MB cap, per-service bucket ownership, metadata/payload separation), Go AWS SDK v2 code patterns, the singleton and collection API shapes, the Helm chart credential-mode contract (static creds for local, IRSA for deployed), the nats-s3 sidecar local backend, the nginx-s3-gateway local CDN model, and the S3_BUCKET/AWS_REGION/S3_ENDPOINT_URL/S3_CREATE_MISSING_BUCKET/ CDN_URL_PREFIX env var contract. Fires on prompts like "object storage", "S3", "file upload", "upload endpoint", "attachments",…