feat: add local correlation filters and full recheck action

backend/tests/test_correlation_recheck.py

@@ -0,0 +1,50 @@
+"""Full rechecks freeze all passing targets and overwrite existing correlation results."""
+
+import pytest
+
+from app.alphas import upsert_alpha
+from app.models import Alpha, SelfCorrelation
+from tests.conftest import alpha
+from tests.test_jobs import result
+
+
+async def test_recheck_all_passed_targets_deduplicates_and_repeats(app, logged_in):
+    runner = app.state.runner
+    async with runner.sessions.begin() as db:
+        for i in range(105):
+            row = await upsert_alpha(db, alpha(f"pass{i:03}"))
+            row.check_type = "PRE_CHECK" if i % 2 else "PASS"
+        for name, status in [("failed", "FAIL_1"), ("failed2", "FAIL_2"), ("pending", "PENDING")]:
+            row = await upsert_alpha(db, alpha(name))
+            row.check_type = status
+        db.add(SelfCorrelation(alpha_id="pass000", region="USA", stale=False,
+                               result={"status": "high", "max_correlation": 0.9}))
+    response = await logged_in.post("/api/v1/sync-jobs", json={"kind": "self_correlation_recheck"})
+    assert response.status_code == 202
+    job = response.json()
+    assert job["total"] == 105
+    assert job["payload"]["alpha_ids"] == [f"pass{i:03}" for i in range(105)]
+    duplicate = (await logged_in.post("/api/v1/sync-jobs", json={"kind": "self_correlation_recheck"})).json()
+    assert duplicate["id"] == job["id"]
+    await runner.execute(job["id"])
+    completed = await result(runner, job["id"])
+    assert completed.status == "completed" and completed.processed == 105
+    async with runner.sessions() as db:
+        for i in range(105):
+            cached = await db.get(SelfCorrelation, f"pass{i:03}")
+            assert cached.stale is False and cached.result["max_correlation"] == 0
+        assert await db.get(SelfCorrelation, "failed") is None
+        assert (await db.get(Alpha, "pass000")).check_type == "PASS"
+    again = (await logged_in.post("/api/v1/sync-jobs", json={"kind": "self_correlation_recheck"})).json()
+    assert again["id"] != job["id"] and again["total"] == 105
+
+
+async def test_empty_recheck_completes_without_platform_connection(logged_in):
+    response = await logged_in.post("/api/v1/sync-jobs", json={"kind": "self_correlation_recheck"})
+    assert response.status_code == 202
+    assert response.json()["total"] == 0 and response.json()["status"] == "completed"
+
+
+@pytest.mark.parametrize("extra", [{"alpha_ids": ["target"]}, {"submission": "UNSUBMITTED"}, {"date_from": "2026-01-01"}])
+async def test_recheck_rejects_partial_scope(logged_in, extra):
+    assert (await logged_in.post("/api/v1/sync-jobs", json={"kind": "self_correlation_recheck", **extra})).status_code == 422