fix: separate reference retrieval from skill activation

[qiansc]

Summary

• Separate missing-package reference retrieval from enabling host Skills and Rules.
• Follow bundled query skills only when already enabled by the host or explicitly authorized.
• Require isolated retrieval without changing project/user skills, rules, configuration, package locks or knowledge navigation; reuse suitable task-local material.
• Regenerate repository installation adapters from the canonical skill.

This is generic community guidance. It contains no internal platform commands or business data. No package publication or version bump is included.

Validation

• Plugin resource generation passed.
• Focused host-routable inspection skill test: 1 passed, 18 assertions.
• git diff --check passed.