pre-push-review

Self-review the current branch's diff against nextcloud-mcp-server review patterns before pushing a PR. Runs ruff/ty/tests on changed files and produces a punch list of likely review-round findings, calibrated to issues that have repeatedly surfaced in this repo's automated PR reviews. Use when the user is about to push, says "ready to push", "review my work", "check before PR", or invokes /pre-push-review.…