v1.3.2: Lint Cleanup & Code Quality

- Complete lint cleanup (Phase 1-7)
- Replace magic numbers with constants
- Remove unused imports/members
- Add Logger.w() for swallowed exceptions
- Custom SyncException for better error handling
- ConstructorParameterNaming with @SerializedName
- ReturnCount & Destructuring with @Suppress
- F-Droid: Add privacy notice for file logging
- Update docs (FEATURES.md, README.md)
- Add fastlane changelogs for versionCode 10

fastlane/metadata/android/en-US/changelogs/10.txt

@@ -0,0 +1,5 @@
+Under the hood improvements:
+- Improved sync performance through optimized code
+- More stable error handling for connection issues
+- More memory-efficient data processing
+- Added privacy notice for file logging