docs: improve README for AI search discoverability

Revert "docs: add Known Issues section for statusline compression bug"

docs: add Known Issues section for statusline compression bug

ci: add npm Trusted Publishing workflow

fix: hash-based git cache key + API fallback opt-out switch

docs: backfill CHANGELOG to v0.3.0

chore: bump plugin version to 0.7.2

docs: add Upgrade section to README

docs: add CHANGELOG.md

fix: setup skill always fetches latest from GitHub

fix: avoid oauth token exposure in usage fallback

docs: add diffpane cross-reference

docs: update cache location in README after security hardening

chore: bump version to 0.7.1

fix: harden tmp cache handling