chore: remove internal telemetry tracker

[DeepZone]

Summary

Remove the centrally operated telemetry receiver and internal dashboard implementation from the public Container Pilot repository.

Changes

• remove the complete tracker/ directory
• remove tracker dependency installation, tests, PostgreSQL service, audit, syntax checks, YAML parsing, and image build from CI
• retain Container Pilot telemetry client behavior, client-side privacy tests, and public telemetry documentation

Scope

This does not change the Container Pilot version, telemetry opt-in behavior, transmitted payload, public tracker deployment, DNS, reverse proxy, database, or release artifacts.

Validation

• npm test: 35 passed, 1 expected Docker integration skip, 0 failed
• JavaScript syntax checks passed
• YAML parsing passed
• git diff --check passed
• no remaining CI reference to the removed tracker project

History note

This PR removes the tracker from the current repository tree. Existing Git history is not rewritten.