# Historical V2 — Canonical Current Schema Contract (L0)

Diese Artefakte materialisieren den **CURRENT VERIFIED PRODUCTION SCHEMA CONTRACT**
als kanonische L0-Autorität (D1/D2 Remediation, forward-only).

- `historical_v2_schema.sql`   — schema-only PostgreSQL-Contract (kein DML/Secrets/volatile Artefakte)
- `historical_v2_schema.json`  — maschinenlesbares kanonisches Modell
- `historical_v2_schema.sha256` — deterministischer SHA-256-Fingerprint
- Kanonischer Fingerprint: `b49f64337ffafc0e73d46e009aa802cd0172d59421b7df61d3eb198775c1986d`

Dies ist KEINE historische Migrationskette. DO NOT INVENT HISTORY: der L0-Contract
beansprucht ausschliesslich CURRENT PRODUCTION TRUTH (§1).
Historische Artefakte (Wave1 `6983526da3ca51fd2ececffbef0ccbd66b048a3d11c228000011aaba3e1d6bc5`, WaveD `7aa4e2a10c98fa327e000a49f6a497efb5814c8808dba429dfebfc90c544a02b`) bleiben unverändert.

**Semantic Overrides (§4):**
- last_successful_chunk = timestamp with time zone (Production+Owner; WaveD-historical text bleibt immutable Evidence)
- interrupt_reason = text (preserved, origin unknown, do not remove)
- technical_quality = text nullable default 'VALID' (historical provenance debt OPEN)

**SoT:** origin/main = `e56567f7cfae68da70c11ece6f576e974488f343`