feat(consent-tester): Phase E — self-improving CMP library

cmp_discovery_log.py:
- sqlite log at /data/cmp_discoveries.db: every LLM-discovered CMP
  pattern recorded with domain, strategy, value, sample text
- Auto-promote (user-chosen 'voll automatisch' mode): when LLM returns
  strategy=url AND extracted text >= 800 words, write a new module
  /data/auto_cmp/auto_<slug>.py with derived regex matcher + reconstruct
- record_discovery() called from dsi_discovery._try_llm_cascade on success

cmp_library/_registry.py:
- Loads both hand-written modules from services/cmp_library/ AND
  auto-promoted modules from /data/auto_cmp/ (CMP_AUTO_DIR env)
- Auto modules use importlib.util.spec_from_file_location, no package
  install needed; restart consent-tester to pick up new ones

dsi_discovery.py:
- _try_llm_cascade now calls record_discovery() on every successful
  LLM analysis (cached AND fresh)

main.py:
- GET /cmp-discoveries — admin endpoint listing all logged discoveries
- DELETE /cmp-discoveries/{id} — rollback (unlinks auto_*.py)

This closes the self-improving loop: first encounter with a new CMP fires
the LLM (cost) → discovery is auto-promoted → all future runs against the
same vendor pattern hit Phase B (Named CMP) at <50ms with no LLM call.

consent-tester/main.py

@@ -344,3 +344,20 @@ async def dsi_discovery(req: DSIDiscoveryRequest):
         errors=result.errors,
         scanned_at=datetime.now(timezone.utc).isoformat(),
     )
+
+
+# ── Admin: CMP discoveries (Phase E) ────────────────────────────────
+
+@app.get("/cmp-discoveries")
+async def cmp_discoveries(limit: int = 200):
+    """List LLM-discovered CMP patterns (Phase E auto-promote log)."""
+    from services.cmp_discovery_log import list_discoveries
+    return {"discoveries": list_discoveries(limit=limit)}
+
+
+@app.delete("/cmp-discoveries/{disc_id}")
+async def cmp_discovery_delete(disc_id: int):
+    """Delete a discovery + its auto-promoted module (rollback)."""
+    from services.cmp_discovery_log import delete_discovery
+    ok = delete_discovery(disc_id)
+    return {"deleted": ok, "id": disc_id}