feat: complete catalog-driven preprocessing

harness/tht/search/__init__.py

@@ -82,6 +82,8 @@ def _vector_key(hit) -> str:
         return f"column:{hit.ref}"
     if hit.kind == "schema_table":
         return f"table:{hit.ref}"
+    if hit.kind == "schema_relationship":
+        return f"relationship:{hit.ref}"
     return f"evidence:{hit.id}"
 
 
@@ -92,7 +94,13 @@ def schema_tables(results: list["SearchResult"], top_tables: int) -> list[tuple[
     ignorati."""
     best: dict[str, float] = {}
     for r in results:
-        if r.kind not in ("schema_table", "schema_column"):
+        if r.kind not in ("schema_table", "schema_column", "schema_relationship"):
+            continue
+        if r.kind == "schema_relationship":
+            endpoints = r.key.split(":", 1)[1].split("->", 1)
+            for table in endpoints:
+                if table not in best or r.rrf > best[table]:
+                    best[table] = r.rrf
             continue
         table = r.key.split(":", 1)[1].split(".", 1)[0]
         if table not in best or r.rrf > best[table]: