Blocker identified:
- Extraction pipeline (extract.rs) doesn't use Phase 4 layout pipeline
- Column detection functions never called in production
- SpanJson.column hardcoded to None (lines 1059, 1916)
- No end-to-end tests for acceptance criteria
Span struct HAS column field (line 179) but extraction doesn't use it.
Coordinator CANNOT CLOSE - sub-phase not end-to-end functional.
The encrypt_padded_mut API requires the buffer to be large enough to
hold the padded ciphertext. The tests were using plaintext.to_vec() which
only allocated plaintext.len() bytes, insufficient for padding.
Changed pattern:
- Before: plaintext.to_vec() (insufficient space)
- After: vec![0u8; plaintext.len() + 16] with copy_from_slice
Also fixed incorrect usage: encrypt_padded_mut returns Result<(), Error>,
not a length. Use data_copy.len() directly for ciphertext length.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
