Limbo v2026.4.15

• chore: retrigger CI (12e0751)
• chore: switch release workflow to version-from-package-json model (f0d0b70)
• fix: promote staging to main (#252) (c276c2b)
• chore: migrate CI/CD back to GitHub with GitLab as dormant fallback (#253) (61f79df)
• refactor: remove trivial JSDoc and historical comments (825a001)
• refactor: consolidate shared MCP utilities and strengthen types (3021167)
• fix: clean up legacy references and unnecessary defensive code (33e60dd)
• fix: cloud activate before config + release v2026.5.0 (ce6f73c)
• fix: serve install script from get.heylimbo.com instead of GitHub raw (ebf9b24)
• chore: release v2026.4.14 (e674a3b)