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Zoltan Kochan d09d9d8efb perf: store raw JSON blob instead of per-version manifests

Replace metadata_manifests (per-version rows requiring JSON.stringify
per manifest) with metadata_blobs (single raw JSON blob per package).

Write path: store the raw registry response text as-is — zero
serialization on the hot path. Only the compact index fields
(dist-tags, version keys, deprecated flags) are extracted.

Read path: parse the lightweight index for version picking, then
parse the blob and extract just the resolved version's manifest.

This eliminates the cold install regression caused by hundreds of
JSON.stringify calls per install. The index table still provides
cheap header lookups for conditional requests.

Also tracks is_full flag on the index to avoid serving abbreviated
metadata when full is requested (e.g., for optional dependencies).

2026-04-01 17:19:04 +02:00