Add STT and Telemetry domain overview files

[Coldaine]

This submission adds the missing domain overview files for Speech-to-Text (STT) and Telemetry, as required by the MasterDocumentationPlaybook 1.0.1 (4.1).

In addition to creating the overview files, I reorganized existing documentation by moving domain-specific files (logging.md, observability-playbook.md, and stt-parakeet-integration-plan.md) into their respective domain folders. To maintain backward compatibility and follow project standards, I left redirect stubs at the original locations and updated the main documentation index.

All files now include the mandatory frontmatter, including domain_code, version, and review metadata. Documentation naming validation was confirmed using the project's internal validation script.

Fixes #351

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PR created automatically by Jules for task 11064652610932299584 started by @Coldaine

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CI Feedback 🧐

A test triggered by this PR failed. Here is an AI-generated analysis of the failure:

Action: CI Success Summary

Failed stage: Generate CI Report [❌]

Failed test name: ""

Failure summary: The action failed in the CI report/summary step because a required upstream job did not succeed: - setup-whisper-dependencies is reported as cancelled (line 128), but the script enforces success: - if [[ "cancelled" != "success" ]]; then echo "::error::Setup Whisper dependencies failed."; exit 1; fi (line 133) - This caused the workflow to emit ##[error]Setup Whisper dependencies failed. (line 146) and exit with code 1 (line 147). Additional blocking conditions were also present: - unit_tests_hosted and text_injection_tests are skipped (lines 130–131), and the script would also exit 1 for these because it requires success (lines 135–136).

Relevant error logs: 1: ##[group]Runner Image Provisioner 2: Hosted Compute Agent ... 118: Or undo this operation with: 119: git switch - 120: Turn off this advice by setting config variable advice.detachedHead to false 121: HEAD is now at 438a9dc Merge 6e60b8574e83482f174879e51e40dbe52d0f990c into 9b20395fd32fe10b42eb09464a55455931580a7e 122: ##[endgroup] 123: [command]/usr/bin/git log -1 --format=%H 124: 438a9dc448a4d11764541e3e145918a9896ed9f3 125: ##[group]Run echo "## CI Report" > report.md 126: �[36;1mecho "## CI Report" > report.md�[0m 127: �[36;1mecho "- validate-workflows: cancelled" >> report.md�[0m 128: �[36;1mecho "- setup-whisper-dependencies: cancelled" >> report.md�[0m 129: �[36;1mecho "- security_audit: success" >> report.md�[0m 130: �[36;1mecho "- unit_tests_hosted: skipped" >> report.md�[0m 131: �[36;1mecho "- text_injection_tests: skipped" >> report.md�[0m 132: �[36;1mecho "- moonshine_check: cancelled (optional)" >> report.md�[0m 133: �[36;1mif [[ "cancelled" != "success" ]]; then echo "::error::Setup Whisper dependencies failed."; exit 1; fi�[0m 134: �[36;1mif [[ "success" != "success" ]]; then echo "::warning::Security audit failed - check for vulnerabilities."; fi�[0m 135: �[36;1mif [[ "skipped" != "success" ]]; then echo "::error::Build and check failed."; exit 1; fi�[0m 136: �[36;1mif [[ "skipped" != "success" ]]; then echo "::error::Text injection tests failed."; exit 1; fi�[0m 137: �[36;1mif [[ "cancelled" != "success" ]]; then echo "::warning::Moonshine check failed (optional)."; fi�[0m 138: �[36;1mecho "All critical stages passed successfully."�[0m 139: shell: /usr/bin/bash --noprofile --norc -e -o pipefail {0} 140: env: 141: CARGO_TERM_COLOR: always 142: WHISPER_MODEL_SIZE: tiny 143: MIN_FREE_DISK_GB: 10 144: MAX_LOAD_AVERAGE: 5 145: ##[endgroup] 146: ##[error]Setup Whisper dependencies failed. 147: ##[error]Process completed with exit code 1. 148: Post job cleanup.