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.

src/core/model/bank_model.cpp

@@ -458,4 +458,4 @@ std::optional<BankModel> BankModel::deserialize(const std::string& blob) {
     return idx;
 }
 
-} // namespace reasampler::model
+} // namespace reasampler::model

src/core/model/bank_model.h

@@ -214,4 +214,4 @@ private:
     std::vector<Sample> samples_;  // insertion order preserved
 };
 
-} // namespace reasampler::model
+} // namespace reasampler::model

src/core/model/owned_manifest.cpp

@@ -110,4 +110,4 @@ std::optional<OwnedFileManifest> OwnedFileManifest::deserialize(const std::strin
     return m;
 }
 
-} // namespace reasampler::model
+} // namespace reasampler::model

src/core/model/owned_manifest.h

@@ -88,4 +88,4 @@ private:
     std::vector<std::string> paths_;  // insertion order; deduplicated
 };
 
-} // namespace reasampler::model
+} // namespace reasampler::model

src/core/model/provenance.cpp

@@ -159,4 +159,4 @@ std::optional<std::string> detectParent(
     return parent;
 }
 
-}  // namespace reasampler::model
+}  // namespace reasampler::model

src/core/model/provenance.h

@@ -146,4 +146,4 @@ std::optional<std::string> detectParent(
     const std::vector<std::string>& sourceItemFiles,
     const std::vector<BankFileRef>& bankFiles);
 
-}  // namespace reasampler::model
+}  // namespace reasampler::model