chunk Content Size Kbs
Threshold (in kilobytes) above which a scrape response is split into chunked gRPC messages; also the chunk buffer size. This is the raw --chunk input value and keeps the unit of the config key/env var.
-1 means "fall back to CHUNK_CONTENT_SIZE_KBS env var, then agent.chunkContentSizeKbs (default 32 KB)". Validated > 0. The byte value used at runtime is the derived chunkContentSizeBytes.