chore: fix v1.7.0 audit documentation drift

[arapov]

Summary

• align release-facing docs and source comments with the v1.7.0 minor-release train
• add delete_tag_definition to the README tool table and cache invalidation docs
• rename the new live-probe scripts to v1.7.0-specific names
• add regression coverage for delete_tag_definition cache invalidation and merged timeline windows that cross the 100-entry ceiling

Verification

• npm run format:check
• npm test -- tests/entries.test.ts tests/cache.test.ts tests/tags.test.ts tests/tool-annotations.test.ts tests/mcp-integration.test.ts tests/http-app.test.ts tests/log-events.test.ts
• npm run typecheck
• npm run lint
• npm run build
• npm test
• npm audit --audit-level=low
• npm outdated --json (only @biomejs/biome 2.4.15 -> 2.4.16 latest)
• npm install --package-lock-only --ignore-scripts
• npm view capsulemcp dist-tags version versions --json --cache /private/tmp/capsulemcp-npm-cache
• npm pack --dry-run --json --cache /private/tmp/capsulemcp-npm-cache
• npm publish --dry-run --tag latest --cache /private/tmp/capsulemcp-npm-cache
• npm run check
• git diff --check

[arapov]

Cherry-picked the real fixes (README tool-table row for delete_tag_definition, the cache.ts doc-comment accuracy fix, the delete_tag_definition cache-invalidation test, and the crossing-ceiling merged-timeline test) into the PR linked above, which targets current master. Dropped the v1.6.6→v1.7.0 doc rewrites and the wire-trace-v166/v167→v170-* renames — the probe scripts are iteration markers (v163–v167), not release versions; renaming them breaks the sequence and the NOTES references (same call as #62/#64). Good catches on the README table + cache comment — those were real gaps my audit missed. Thanks!