docs: fix 5 broken documentation links from maintenance run 229

[GrammaTonic]

Summary

Fixes all 5 broken documentation links reported by maintenance workflow run #229.

Changes

File	Broken Link	Fix
PHASE2_IMPLEMENTATION_SUMMARY.md	./tests/integration/PHASE2_TESTING_GUIDE.md	Fixed relative path to ../../tests/integration/...
PHASE2_IMPLEMENTATION_SUMMARY.md	./tests/integration/test-phase2-metrics.sh	Fixed relative path to ../../tests/integration/...
PROMETHEUS_TIMELINE_VISUAL.md	/plan/feature-prometheus-monitoring-1.md	Replaced absolute path with relative ../../plan/...
prometheus-metrics-phase1.md	../community/SUPPORT.md	File doesn't exist; replaced with CONTRIBUTING.md
PERFORMANCE_OPTIMIZATIONS.md	features/PARALLEL_NPM_RESULTS.md	File never created (rejected feature); removed dead link

Type of Change

• Documentation update

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on enhancing the reliability and accuracy of the project's documentation by addressing and resolving five broken links. The changes ensure that all referenced documents and scripts are correctly accessible, improving the overall user experience and maintainability of the documentation.

Highlights

• Documentation Link Fixes: Resolved 5 broken documentation links identified by a maintenance workflow run.
• Relative Path Corrections: Updated relative paths for PHASE2_TESTING_GUIDE.md and test-phase2-metrics.sh in PHASE2_IMPLEMENTATION_SUMMARY.md.
• Absolute to Relative Path Conversion: Changed an absolute path to a relative path for feature-prometheus-monitoring-1.md in PROMETHEUS_TIMELINE_VISUAL.md.
• Non-existent File Replacement: Replaced a link to the non-existent SUPPORT.md with CONTRIBUTING.md in prometheus-metrics-phase1.md.
• Dead Link Removal: Removed a dead link to PARALLEL_NPM_RESULTS.md from PERFORMANCE_OPTIMIZATIONS.md as the associated feature was rejected.

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Changelog

• docs/PERFORMANCE_OPTIMIZATIONS.md
  • Removed a dead link to 'PARALLEL_NPM_RESULTS.md' which referred to a rejected feature.
• docs/features/PHASE2_IMPLEMENTATION_SUMMARY.md
  • Updated the relative path for 'PHASE2_TESTING_GUIDE.md' from './tests/integration/...' to '../../tests/integration/...' to ensure correct navigation.
  • Updated the relative path for 'test-phase2-metrics.sh' from './tests/integration/...' to '../../tests/integration/...' to ensure correct navigation.
• docs/features/PROMETHEUS_TIMELINE_VISUAL.md
  • Corrected the link to 'feature-prometheus-monitoring-1.md' by changing it from an absolute path '/plan/...' to a relative path '../../plan/...'.
• docs/features/prometheus-metrics-phase1.md
  • Replaced a broken link to '../community/SUPPORT.md' with a valid link to '../community/CONTRIBUTING.md' as the former file does not exist.

Activity

• No human activity has been recorded for this pull request yet.

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[gemini-code-assist]

Code Review

This pull request addresses several broken links within the project's documentation. The changes include removing a link to a rejected feature's non-existent analysis file, correcting relative paths for integration tests and implementation plans, and replacing a link to a missing support file with a valid link to the contributing guide. All modifications appear to be correct and effectively resolve the documented link issues.