Q-W1 code-review follow-ups: restore 104 trailing newlines, relocate reasampler_uid.h to core/wire, drop ext_keys namespaces shim, add slot_map_tests, golden serialize literals for 4 modules, namespaces.h/pragma-once ordering sweep. 60/60 green.

tests/test_owned_manifest.cpp

@@ -36,6 +36,18 @@ static void testEmptyManifest() {
     CHECK(back->empty());
 }
 
+// Golden byte-literal (Q-W1 follow-up): pins the EXACT serialized bytes for a
+// small fixture (two paths), not just self-consistent re-serialization — a
+// format drift that both writer and reader agree on would slip past the
+// round-trip tests but not this. The format is frozen as-shipped; the literal
+// below is the captured current output.
+static void testSerializeGoldenLiteral() {
+    OwnedFileManifest m;
+    m.add("reasampler_bank/a.wav");
+    m.add("reasampler_bank/b.wav");
+    CHECK(m.serialize() == "{\"owned\":[\"reasampler_bank/a.wav\",\"reasampler_bank/b.wav\"]}");
+}
+
 // --- add / contains / order --------------------------------------------------
 
 static void testAddAndContains() {
@@ -159,6 +171,7 @@ static void testMalformedParse() {
 }
 
 int main() {
+    testSerializeGoldenLiteral();
     testEmptyManifest();
     testAddAndContains();
     testDedupRepeatedAdds();