[Feat] [SDK-399] Add java agent for network telemetry events

[buongarzoni]

Description of the change

Add Java agent for automatic network telemetry capture

Auto-instruments all major HTTP clients via -javaagent: using ByteBuddy, capturing 4xx/5xx responses as Rollbar telemetry events with zero code changes required from the user.

Caution

This module targets JVM-based applications only. Android is not supported — ART does not implement the java.lang.instrument API required by Java agents. Android users should use the existing rollbar-android module instead.

What's included:

• New rollbar-java-agent module — shadow JAR with ByteBuddy bundled and relocated
• Instruments HttpURLConnection, java.net.http.HttpClient, Apache HC 4.x and 5.x
• URL sanitization (strips credentials, query params, fragment before recording)
• Deduplication via WeakHashMap to handle re-entrant getResponseCode() calls and dual-advice firing on HttpClient
• Integration tests using WireMock 3.x for each instrumented client
• README with installation and manual testing guide

Usage:

  -javaagent:/path/to/rollbar-java-agent.jar

  Rollbar.init(withAccessToken("...")
      .telemetryEventTracker(RollbarAgent.getTelemetryTracker())
      .build());

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Maintenance
• New release

Related issues

Shortcut stories and GitHub issues (delete irrelevant)

• Fix [SC-]
• Fix Remove GSON Dependency #1

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers assigned
• Issue from task tracker has a link to this pull request
• Changes have been reviewed by at least one other engineer

[linear-code]

SDK-399

[buongarzoni]

@claude review

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[buongarzoni]

@claude review