v0.4.3 — discoverability metadata sweep

Discoverability metadata sweep — no code changes, just making the project findable.

Changed

• package.json: description rewritten to reflect 0.4 reality (security, MCP, file recovery, multi-tool — not just image cleanup). keywords expanded from 9 to 25, covering every supported tool name + every primary capability + the MCP / security framing. Added homepage pointing at the GitHub repo.
• GitHub repo metadata: description matches the npm one. Homepage points to the npm package page. 15 topics added covering tools, capabilities, and tech stack — none were set previously, so the repo wasn't appearing in GitHub topic browses or "related repositories" suggestions.