fix: update stale org/openjdk/btrace path strings to io/btrace

[jbachorik]

Summary

Found while auditing refactor/module-consolidation (a separate, now-superseded branch that independently reached the same module layout develop already has): a handful of path-filter and ASM-descriptor string literals still referenced the pre-repackaging org.openjdk.btrace package, missed by the org.openjdk.btrace → io.btrace repackaging.

• BTraceExtensionPlugin: ASM annotation descriptors for ServiceDescriptor/ExtensionDescriptor used the old binary names, so bytecode scanning for these markers matched nothing (extension permission/API-partition logic silently no-op'd on these markers).
• SingleSourceApiPartition: same descriptor mismatch for ServiceDescriptor/ExternalType.
• PermissionScanner: JFR permission detection checked the old package prefix.
• btrace-dist: stale doc-comment example paths (the actual classdata masking filters were already correct).
• btrace-agent, btrace-core, btrace-dtrace, benchmarks/*: stale javadoc exclude, jacoco include filter, and shadowJar/jmhJar include filters.

Test plan

• ./gradlew test — full suite passes
• :btrace-gradle-plugin:test (TestKit) fails identically on unmodified develop in this environment (Gradle 9.5.1 vs. the module's JDK 11 toolchain → UnsupportedJavaRuntimeException) — confirmed pre-existing and unrelated to this change, not something this PR introduces or fixes
• Verified no remaining org/openjdk/btrace / org.openjdk.btrace references in any .gradle/.groovy file

🤖 Generated with Claude Code

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This change is 

[Copilot]

Pull request overview

This PR updates remaining stale org.openjdk.btrace / org/openjdk/btrace string literals to io.btrace / io/btrace across the Gradle plugin and build tooling, aligning bytecode descriptor checks and path-based filters with the post-repackaging package layout so extension scanning and packaging filters work correctly.

Changes:

• Fix ASM descriptor string literals used for annotation-based scanning (ServiceDescriptor, ExtensionDescriptor, ExternalType) so bytecode scanning matches again.
• Update path-prefix checks and Gradle include/exclude filters (Shadow/JMH/Jacoco/Javadoc) to use io/btrace/....
• Refresh a distribution build comment block example to reflect the current io/btrace/... layout.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
btrace-gradle-plugin/src/main/groovy/io/btrace/gradle/SingleSourceApiPartition.groovy	Updates ASM descriptor strings for extension API partitioning to io/btrace.
btrace-gradle-plugin/src/main/groovy/io/btrace/gradle/PermissionScanner.groovy	Updates JFR owner-prefix detection to io/btrace/core/jfr/.
btrace-gradle-plugin/src/main/groovy/io/btrace/gradle/BTraceExtensionPlugin.groovy	Updates annotation descriptor strings used for extension/service scanning and permission extraction.
btrace-dtrace/build.gradle	Updates ShadowJar include filter to the io/btrace/dtrace/** package path.
btrace-dist/build.gradle	Updates fat-agent JAR structure comment examples to io/btrace/....
btrace-core/build.gradle	Updates JaCoCo class include filter path to io/btrace/core/comm/**.
btrace-agent/build.gradle	Updates Javadoc exclusion path for PerfReaderImpl.java to io/btrace/....
benchmarks/runtime-benchmarks/build.gradle	Updates JMH jar include filters to io/btrace/... packages.
benchmarks/agent-benchmark/build.gradle	Updates JMH jar include filters to io/btrace/... packages.