fix: Embedding views with partial FK references broken

This is a regression introduced in d2719420f4.

Fixes #2548

Signed-off-by: Wolfgang Walther <walther@technowledgy.de>

test/spec/Feature/Query/EmbedDisambiguationSpec.hs

@@ -563,3 +563,6 @@ spec =
               }
             ]|]
           { matchHeaders = [matchContentTypeJson] }
+
+    it "should not expose hidden FKs" $
+      get "/va?select=vb(*)" `shouldRespondWith` 200

test/spec/fixtures/schema.sql

@@ -2980,3 +2980,19 @@ select parent.parent as grandparent,
        join public.i2459_self_t as child
          on child.parent = parent.id
  where child.type = 'B';
+
+-- issue https://github.com/PostgREST/postgrest/issues/2548
+CREATE TABLE public.ta (
+  a1 INT PRIMARY KEY,
+  a2 INT,
+  UNIQUE (a1, a2)
+);
+
+CREATE TABLE public.tb (
+  b1 INT REFERENCES public.ta (a1),
+  b2 INT,
+  FOREIGN KEY (b1, b2) REFERENCES public.ta (a1, a2)
+);
+
+CREATE VIEW test.va AS SELECT a1 FROM public.ta;
+CREATE VIEW test.vb AS SELECT b1 FROM public.tb;