[shellharbor]

Summary

• Update README and the Python Package Wiki for the published shellharbor-watchdog==1.7.9 package, keeping TestPyPI separate from production installation.
• Record verified GitHub release, OIDC publisher, signed-asset, and clean Linux installation evidence, with links to the completed publishing runs.
• Update the signing guide for the independently verified v1.7.9 archive/checksum signatures and record these documentation changes in CHANGELOG.

Synchronization and scope

• Fetched origin/main before preparing this branch and rechecked/rebased it immediately before pushing.
• Based on 5abea45d71819d3685f5f95982fadace5f347eeb, including the merged Dependabot updates.
• Exactly four Markdown files change. Runtime, dependency locks, Dockerfiles, GitHub Actions workflows, VERSION, and immutable release tag v1.7.9 are unchanged.
• Prepared in a clean worktree; unrelated local edits/staging and ignored AI-KIT files were not included.
• This PR does not publish another package, image, tag, or release. Existing review/merge protections remain in place.

Verification

• git diff --check passed.
• All 43 relative documentation links resolve; both new README-to-Wiki anchors exist.
• Confirmed that only the four intended documents differ from current main and dependency/workflow/runtime files are unchanged.
• Rechecked release v1.7.9, its four signed assets, and the successful signing/container publication runs.
• This is documentation-only: the full runtime regression suite was not rerun locally. Normal repository CI is triggered for this PR.

Publication evidence

• GitHub release v1.7.9
• Production PyPI publication
• Signed release artifacts
• Container publication