Feature/tab 01 bundle analysis - #630
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…ion (TAB-01) bundle_analysis_generations() tars every complete, published generation (<stage>_outputs/generations/<generation_id>/) into bundle_root/<kind>/<generation_id>.tar, uncompressed, using the existing generation_listing.list_experiment_generations() enumeration rather than inventing new discovery logic. Idempotent via a .tar.json sidecar recording the bundle's own checksum -- a rerun re-checksums the bundle, not the (possibly huge) source, since a published generation never changes. This addresses the real transfer pain measured this session: a lab's analyses/ tree ran to 2.4M files for ~600GB, and rsync between two local drives slowed to under 1MB/s once it hit the zarr-chunk-dense parts. Zarr v3 sharding and coarser source-side partitioning were both tested/considered and rejected first -- see the plan doc. TAB-02 (unbundle, validating via each stage's existing generation validator) and TAB-03 (real-data round-trip qualification) remain open. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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