Publish IF.TTT chain proof + verifier note for trace bundle

VERIFY_EMO_TRACE_016cca78-6f9d-4ffe-aec0-99792d383ca1.md

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+# Verify emo-social trace bundle (external)
+
+Artifacts:
+- Tarball: `emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.tar.gz`
+- SHA256: `7101ff9c38fc759a66157f6a6ab9c0936af547d0ec77a51b5d05db07069966c8`
+- IF.TTT handle (PQ hybrid signed in registry): `if://citation/c24fe95e-226c-4efc-ba22-5ddcc37ff7d2/v1`
+
+Download (avoid copy/paste corruption):
+```bash
+curl -L -o emo.tar.gz \
+  'https://git.infrafabric.io/danny/hosted/raw/branch/main/emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.tar.gz'
+# If your environment blocks inline content-disposition, try:
+curl -L -o emo.tar.gz \
+  'https://git.infrafabric.io/danny/hosted/raw/branch/main/emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.tar.gz?download=1'
+
+sha256sum emo.tar.gz
+```
+
+Run verifier:
+```bash
+python3 -m venv venv
+./venv/bin/pip install canonicaljson pynacl
+./venv/bin/python iftrace.py verify emo.tar.gz \
+  --expected-sha256 7101ff9c38fc759a66157f6a6ab9c0936af547d0ec77a51b5d05db07069966c8
+```
+
+IF.TTT corroboration note:
+- The `if://citation/...` handle is not web-searchable. It is an internal registry identifier.
+- For external review without registry access, use the published chain record:
+  - `emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_chain_record.json`
+  - `emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_chain_ref.json`

emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_audit_entry.json

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+{
+  "citation_id": "if://citation/c24fe95e-226c-4efc-ba22-5ddcc37ff7d2/v1",
+  "claim": "emo-social trace payload tarball (v2.1 final, verifiable) for trace_id=016cca78-6f9d-4ffe-aec0-99792d383ca1",
+  "created_utc": "2025-12-21T08:04:55Z",
+  "evidence": {
+    "contents_root": "payload/",
+    "notes": [
+      "sha256s.txt excludes itself and manifest.json",
+      "req_seen head is Ed25519-signed with included public key"
+    ],
+    "payload_manifest_sha256": "b2482c28a63fed84924b5db0ad39afc4461ad9097d61027c64df02f6d88cde59",
+    "pq_algo": "ML-DSA-87 (FIPS 204)",
+    "tar_sha256": "7101ff9c38fc759a66157f6a6ab9c0936af547d0ec77a51b5d05db07069966c8",
+    "ttt_children_sha256": "a304b8d14ac99827010200df6bb25c8101a6acd72ef6402ffbfaa5491c5dc524",
+    "verifier": "/root/tmp/iftrace.py verify"
+  },
+  "host": "mtl-01.infrafabric.io",
+  "kind": "trace_payload_tarball",
+  "schema": "if.ttt.audit_entry.v1",
+  "sha256": "7101ff9c38fc759a66157f6a6ab9c0936af547d0ec77a51b5d05db07069966c8",
+  "source_path": "/root/tmp/emo-trace-package-016cca78-6f9d-4ffe-aec0-99792d383ca1/emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.tar.gz",
+  "trace_id": "016cca78-6f9d-4ffe-aec0-99792d383ca1",
+  "uuid": "c24fe95e-226c-4efc-ba22-5ddcc37ff7d2"
+}

emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_audit_entry.json.sha256

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+db55ba68da4bc11f9c2244c3f0d3eb338db265244e19700ee1447d5ec44c5444  /root/tmp/hosted_repo_update/emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_audit_entry.json

emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_chain_record.json.sha256

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+fb4c332b8fc4e9f08f6f7a9994760facc258da0127eb4371487fffae651f0677  /root/tmp/hosted_repo_update/emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_chain_record.json

emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_chain_ref.json

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+{
+  "citation_id": "if://citation/c24fe95e-226c-4efc-ba22-5ddcc37ff7d2/v1",
+  "content_hash": "e44d6fdda9ff90ff0d0c00f3b1a813942a2022aac585f82dbc9f0b85cdf74afc"
+}

emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_chain_ref.json.sha256

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+c6ea8656af830538adf293e666441ff66666eaca134b943170f84c90495d070c  /root/tmp/hosted_repo_update/emo_trace_payload_016cca78-6f9d-4ffe-aec0-99792d383ca1.ttt_chain_ref.json