docs(provenance): bind immutable dataset source

DATASET_PROVENANCE.json

@@ -0,0 +1,51 @@
+{
+  "schema": "szl.dataset-source-attestation/v1",
+  "observed_at": "2026-07-12T01:30:18Z",
+  "dataset": {
+    "id": "SZLHOLDINGS/szl-artifacts",
+    "repository_type": "dataset",
+    "artifact_kind": "dataset-repository-snapshot",
+    "purpose": "Public diligence and verification artifacts, including signed receipt material and visual assets."
+  },
+  "source_of_record": {
+    "state": "VERIFIED_HF_SOURCE_OF_RECORD",
+    "platform": "huggingface",
+    "repository": "SZLHOLDINGS/szl-artifacts",
+    "artifact_base_revision": "424c9fc890dc0a412583692f6189796c8f76a0e3",
+    "artifact_base_state": "MEASURED_PRE_ATTESTATION_BASE",
+    "artifact_base_url": "https://huggingface.co/datasets/SZLHOLDINGS/szl-artifacts/tree/424c9fc890dc0a412583692f6189796c8f76a0e3",
+    "file_count": 105,
+    "total_bytes": 36097396,
+    "tree_sha256": "23724039441425a537e98a583ba19bbdd35fb5200e104fc2503bd64fb70e6276",
+    "tree_hash_algorithm": "sha256 of UTF-8 path + NUL + per-file content sha256 + LF, sorted by path; .cache excluded"
+  },
+  "public_github": {
+    "state": "CONTEXT_ONLY_NO_BYTE_LEVEL_RELEASE_PARITY",
+    "card_references": [
+      "https://github.com/szl-holdings/.github/blob/main/cosign.pub",
+      "https://github.com/szl-holdings/a11oy/pull/114",
+      "https://github.com/szl-holdings/a11oy/pull/122",
+      "https://github.com/szl-holdings/agi-forecast/pull/51",
+      "https://github.com/szl-holdings/lutar-lean/commit/7ef33a6",
+      "https://github.com/szl-holdings/lutar-lean/pull/106",
+      "https://github.com/szl-holdings/lutar-lean/pull/109",
+      "https://github.com/szl-holdings/lutar-lean/pull/116",
+      "https://github.com/szl-holdings/szl-holdings",
+      "https://github.com/szl-holdings/szl-papers/blob/main/PAPERS_INDEX.md"
+    ],
+    "card_reference_role": "CONTEXTUAL_DOCUMENTATION_RESEARCH_OR_RELATED_CODE_NOT_BUILD_SOURCE_PARITY"
+  },
+  "claims": {
+    "github_repository_parity": "NOT_CLAIMED",
+    "github_build_source": "NOT_CLAIMED",
+    "reproducible_build": "NOT_CLAIMED",
+    "generator_revision": "NOT_CLAIMED",
+    "serving_process_revision": "NOT_APPLICABLE_DATASET_REPOSITORY"
+  },
+  "limits": [
+    "GitHub links in the dataset card are contextual references only; no per-file byte-equivalence to a GitHub release was established in this attestation.",
+    "The attestation overlay cannot self-embed its resulting Hub commit, so artifact_base_revision is the immutable measured pre-overlay tree.",
+    "This artifact establishes public source-of-record identity and tree integrity, not a reproducible generation or build pipeline.",
+    "No claim is made about private repositories or unobserved producer systems."
+  ]
+}