GPS diagnostics module

Diagnostics is a named Java module in mtl-server. Its sources keep the com.x8ing.mtl.server.gpsquality.diagnostics package; its descriptor is in src/main/modules/diagnostics. The application depends on diagnostics; diagnostics depends only on the JDK. The repair module has been removed.

GpxTimestampParser gives review and import the same strict clock interpretation. Missing offsets follow the GPX UTC convention and are logged as assumed UTC; original source text is retained. Import normalizes accepted values before JPX and leaves invalid timestamps absent without dropping geometry. Calendar overflow, leap seconds, excessive precision, and non-GPX offsets remain invalid; exact 24:00:00 means the next midnight.

Maven compiles diagnostics during generate-sources and the application during compile. Separate output directories enforce the boundary even when tests are skipped. Lifecycle initialization clears module outputs and consumer .class files while preserving application resources, so incremental builds cannot retain removed modules or callers of removed APIs. Use lifecycle goals rather than direct compiler goals.

mvn test uses the module path. GpsQualityModuleIsolationTest verifies runtime descriptors and rejects application dependencies. Enable GpsQualityModuleBuildIntegrationTest with -Dmtl.test.jpms.build=true to verify consumer recompilation without clean.

mvn package produces the Boot JAR and the diagnostics JAR under target/gpsquality; Docker runs both. Core classes are excluded from the Boot JAR. Run Java commands in the existing development container. For a packaged run from mtl-server:

java --module-path target/gpsquality \
  --add-modules com.x8ing.mtl.gpsquality.diagnostics \
  -jar target/mtl-server-1.0.0-SNAPSHOT.jar

Maven spring-boot:run is configured with the compiled module path. IDE launches require Maven compilation and equivalent VM arguments; startup rejects classpath-only diagnostics. Keep Spring, filesystem access and persistence in application adapters. Do not add module readability bypasses.