Add 283 source-bound physical-reference photographs with proposed work links
Add 283 additional sanitized JPEGs beyond the existing 150, linked through existing recording-reference and registered-work evidence to 280 existing works and 281 recordings. All 283 work relationships remain proposed deterministic transitive bridges. Exact phase-A scope: 283 new images and five photo-layer texts; 288 paths / 525,105,449 bytes. Original 150 JPEGs, canonical media, indexes, identity registries and root README remain unchanged. 230 sources are exact historically bound references; 53 are provenance-bound review JPEGs with unavailable originals and limited representation. One work retains two unresolved inspection-purpose candidates. Final Viewer and GitHub access projections follow only after this actual source revision exists.