refactor(sp31): rename Match strategy 'auto' to 'pcn-exact' for audit clarity

backend/src/cyclone/reconcile.py

@@ -84,7 +84,7 @@ def match(
         matches.append(Match(
             claim=chosen,
             remittance=r,
-            strategy="auto",
+            strategy="pcn-exact",
             is_reversal=r.is_reversal,
         ))
         used_claim_ids.add(chosen.id)

backend/tests/test_db_models.py

@@ -320,7 +320,7 @@ def test_create_match_and_activity_event():
         ))
         m = Match(
             claim_id="CLM-1", remittance_id="CLP-1",
-            strategy="auto", is_reversal=False,
+            strategy="pcn-exact", is_reversal=False,
             matched_at=datetime(2026, 6, 19, 13, 0, tzinfo=timezone.utc),
         )
         s.add(m)
@@ -335,7 +335,7 @@ def test_create_match_and_activity_event():
     with db.SessionLocal()() as s:
         loaded = s.get(Match, 1)  # autoincrement id
         assert loaded is not None
-        assert loaded.strategy == "auto"
+        assert loaded.strategy == "pcn-exact"
         assert loaded.is_reversal is False
 
         events = s.query(ActivityEvent).all()
@@ -361,7 +361,7 @@ def test_match_multiple_rows_per_claim():
                          status_code="1", received_at=datetime.now(timezone.utc)))
         s.add(Remittance(id="CLP-2", batch_id="b1", payer_claim_control_number="y",
                          status_code="1", received_at=datetime.now(timezone.utc)))
-        s.add(Match(claim_id="CLM-1", remittance_id="CLP-1", strategy="auto",
+        s.add(Match(claim_id="CLM-1", remittance_id="CLP-1", strategy="pcn-exact",
                     matched_at=datetime.now(timezone.utc)))
         s.add(Match(claim_id="CLM-1", remittance_id="CLP-2", strategy="manual",
                     matched_at=datetime.now(timezone.utc),

backend/tests/test_reconcile.py

@@ -55,7 +55,7 @@ def test_match_same_pcn_within_window_matches():
     assert len(matches) == 1
     assert matches[0].claim.id == "CLM-1"
     assert matches[0].remittance.id == "CLP-1"
-    assert matches[0].strategy == "auto"
+    assert matches[0].strategy == "pcn-exact"
 
 
 def test_match_dates_outside_window_unmatched():
@@ -203,7 +203,7 @@ def test_apply_reversal_of_already_reversed_is_noop():
 def test_split_unmatched_partitions_by_match_set():
     claims = [FakeClaim("CLM-1", "A", None), FakeClaim("CLM-2", "B", None)]
     remits = [FakeRemit("CLP-1", "A", None), FakeRemit("CLP-2", "C", None)]
-    matches = [ReconcileMatch(claim=claims[0], remittance=remits[0], strategy="auto", is_reversal=False)]
+    matches = [ReconcileMatch(claim=claims[0], remittance=remits[0], strategy="pcn-exact", is_reversal=False)]
     unmatched_claims, unmatched_remits = reconcile.split_unmatched(claims, remits, matches)
     assert [c.id for c in unmatched_claims] == ["CLM-2"]
     assert [r.id for r in unmatched_remits] == ["CLP-2"]
@@ -306,7 +306,7 @@ def test_run_reversal_flips_paid_to_reversed(fixture_835):
         # Match row already exists from prior reconcile.
         s.add(Match(
             claim_id="CLM-1", remittance_id="CLP-OLD:b1xxxxxx",
-            strategy="auto", matched_at=datetime.now(timezone.utc),
+            strategy="pcn-exact", matched_at=datetime.now(timezone.utc),
             is_reversal=False,
         ))
         s.flush()

src/types/index.ts

@@ -455,7 +455,7 @@ export interface Match {
   id: number;
   claim_id: string;
   remittance_id: string;
-  strategy: "auto" | "manual";
+  strategy: "pcn-exact" | "score-auto" | "manual";
   matched_at: string;
   prior_claim_state?: ClaimState | null;
   is_reversal: boolean;
@@ -507,7 +507,7 @@ export interface UnmatchedResponse {
 
 export interface MatchResponse {
   claim: UnmatchedClaim;
-  match: { id: number; strategy: "auto" | "manual" };
+  match: { id: number; strategy: "pcn-exact" | "score-auto" | "manual" };
 }
 
 // ---------------------------------------------------------------------------