docs(provenance): bind immutable Space source

#4

Metadata-only source attestation for SZLHOLDINGS/sda. Binds pre-overlay revision ab447a66e7f9fed85f29616194c601937aced174 (15 files; tree SHA-256 24e9c97afdeb9dd4778f148a11372831726b77fb086a718915389dba267fccff). Relation: hf-native-source-of-record. Full GitHub repository parity, reproducible build, binary provenance, and exact serving-process revision are not claimed.

Verified reviewed artifact bytes and all 15 existing blob IDs unchanged; merging metadata-only provenance overlay.

betterwithage changed pull request status to merged

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