docs(tasks): remove artificial contributor backlog

[codegeist-ai]

Tracking

• Repository Issue: No repository Issue; this is a maintainer-directed correction removing artificial tracking work.
• Canonical task or exception: No local task needed: the maintainer directly requested removal of the generated task specifications.

Summary

Remove the three generated ready-work specifications and make source navigation describe task documentation conditionally. No runtime configuration or release content changes.

Verification

• task test passed, including the generated release-copy bundle smoke test.
• git --no-pager diff --check passed.
• Confirmed no current documentation references the removed task names or Issue URLs.

Impact Checklist

• I did not include credentials, tokens, sensitive configuration, or private security details.
• I linked the applicable canonical task, or the owning repository permits no new task and I recorded the maintainer-approved reason.
• I assessed security implications and used private reporting where required.
• I assessed whether documentation, tests, or repository-specific checks need updates.
• I assessed whether a generated release branch needs an update.
• I assessed whether consumer repositories or pinned gitlinks need updates.
• Any applicable source -> generated release -> consumer gitlink sequence is documented or complete.
• I acknowledge that my intentional contribution is provided under 0BSD unless the target repository explicitly states another license.

The generated release bundle and consumer gitlinks are unchanged because all changed paths are source-only documentation.