Resolve a UPRN to its historic EPC record by exact match 🟩

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

repositories/historic_epc/historic_epc_resolver.py

@@ -35,8 +35,17 @@ class HistoricEpcResolver:
         )
 
     def record_for_uprn(self, uprn: str, postcode: str) -> Optional[HistoricEpc]:
-        """The postcode shard's certificate for ``uprn``, or None."""
-        return None
+        """The postcode shard's certificate for ``uprn``, or None on a miss.
+
+        Exact UPRN equality only — the prediction path must never import a
+        fuzzy address match's attributes as if observed (ADR-0054)."""
+        if not uprn:
+            return None
+        records: list[HistoricEpc] = self._repo.get_for_postcode(Postcode(postcode))
+        certs: list[HistoricEpc] = [r for r in records if r.uprn == uprn]
+        if not certs:
+            return None
+        return max(certs, key=lambda r: r.lodgement_date)
 
     def resolve_uprn(
         self, user_address: str, postcode: str