fix: keep earliest Apec bridge survivor

src/job_research/apec/dedupe.py

@@ -51,6 +51,8 @@ def _repoint_listing_aliases(
 def dedupe_apec_listings(listings: list[ApecListing]) -> list[ApecListing]:
     url_to_listing: dict[str, ApecListing] = {}
     source_job_id_to_listing: dict[str, ApecListing] = {}
+    survivor_order: dict[int, int] = {}
+    next_order = 0
     deduped: list[ApecListing] = []
 
     for listing in listings:
@@ -68,17 +70,20 @@ def dedupe_apec_listings(listings: list[ApecListing]) -> list[ApecListing]:
 
         if not matches:
             deduped.append(listing)
+            survivor_order[id(listing)] = next_order
+            next_order += 1
             _register_listing(url_to_listing, source_job_id_to_listing, listing, listing)
             continue
 
-        survivor = matches[0]
-        for other in matches[1:]:
+        survivor = min(matches, key=lambda candidate: survivor_order[id(candidate)])
+        for other in matches:
             if other is survivor:
                 continue
 
             _merge_listing_metadata(survivor, other)
             deduped[:] = [item for item in deduped if item is not other]
             _repoint_listing_aliases(url_to_listing, source_job_id_to_listing, other, survivor)
+            survivor_order.pop(id(other), None)
 
         _merge_listing_metadata(survivor, listing)
         _register_listing(url_to_listing, source_job_id_to_listing, listing, survivor)

tests/apec/test_dedupe.py

@@ -178,3 +178,32 @@ def test_dedupe_apec_listings_keeps_one_survivor_for_cluster_alias_chain() -> No
     assert len(deduped) == 1
     assert deduped[0].url == "u2"
     assert deduped[0].source_job_id == "id2"
+
+
+def test_dedupe_apec_listings_keeps_first_listing_as_bridge_survivor() -> None:
+    first = ApecListing(
+        source="apec",
+        source_job_id="id1",
+        url="u1",
+        fetched_at="2026-06-01T10:00:00Z",
+    )
+    second = ApecListing(
+        source="apec",
+        source_job_id="id2",
+        url="u2",
+        fetched_at="2026-06-01T10:01:00Z",
+    )
+    third = ApecListing(
+        source="apec",
+        source_job_id="id1",
+        url="u2",
+        company="NewestCo",
+        fetched_at="2026-06-01T10:02:00Z",
+    )
+
+    deduped = dedupe_apec_listings([first, second, third])
+
+    assert len(deduped) == 1
+    assert deduped[0].url == "u1"
+    assert deduped[0].source_job_id == "id1"
+    assert deduped[0].company == "NewestCo"