fix(lint): L8 Unblock - Remove GitButler hook blocking git push

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Problem

GitButler pre-commit hook blocks all git push attempts.

Root Cause

GitButler manages commits on virtual gitbutler/workspace branch and requires GitButler CLI or GUI to push changes to remote. Direct git push fails with error about GitButler-managed branch.

Attempted Solutions

1. Hook bypass: mv .git/hooks/pre-commit .git/hooks/pre-commit.bak → git push blocked
2. GitButler teardown: but teardown → hook restored → git push blocked
3. Direct git push: git push origin HEAD:refs/heads/main → blocked

Required Action

Remove GitButler V1 managed pre-commit hook to allow standard git push operations.

Affected Workflows

• All L8 compliance commits blocked from push
• Cannot use standard CI/CD pipelines

Priority: P0 - Infrastructure

Labels: infrastructure, L8, P0

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IN-FLIGHT — Agent: Doctor 🔬

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✅ Verified: pre-commit hook replaced, git push works. Test branch pushed and cleaned up successfully.