docs(discovery): publish provisional feature baseline

docs/discovery/references/source-provenance.md

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+# Source Provenance & Audit Baseline
+
+## Target Repository & Snapshot
+
+- **Repository**: `odysseus-dev/odysseus`
+- **Branch**: `discovery`
+- **Pinned Commit SHA**: `d8a2059df8e53bc7275c45339849d14c8651e73c`
+- **Snapshot Date**: `2026-07-23T14:49:02Z`
+
+## Discovery Package Organization
+
+The public discovery documentation package under `docs/discovery/` is structured as follows:
+
+- `feature-catalog.json`: Canonical machine-readable JSON catalog containing 79 feature records.
+- `feature-catalog.md`: Human-readable summary derived from `feature-catalog.json`.
+- `BASELINE-STATUS.md`: Publication status, evidence-validation snapshot, and durable maintainer guidance.
+- `audit-method.md`: Audit rules, scope, and evidence maturity definitions (E0 to E4).
+- `domains/`: 16 functional domain markdown files detailing feature implementations.
+- `references/`: Audit provenance and repository snapshot metadata.
+- `tools/`: Structural, consistency, and evidence validators with focused evidence-validator tests.
+
+## Exclusion Principles
+
+This public documentation package explicitly excludes:
+- Internal planning artifacts or private meeting notes.
+- Machine-specific filesystem paths or user environments.
+- API keys, credentials, or private service endpoints.
+- Application code or automated test mutations.