chore(harness): make repository agent-ready

Add concise routed context, task-aware agent roles, focused skills, and structured learning promotion.\n\nUnify local development and workspace tooling, add layered test and E2E verification, harden MCP authentication, and gate deployment behind verification and explicit production promotion.

e2e/README.md

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+# System E2E
+
+Tests assume `scripts/dev-local.sh up` is already running. Execute with
+`npm run verify:e2e`; the wrapper supplies local-only Supabase credentials and
+refuses remote hosts. Playwright retains traces, screenshots, and videos on
+failure under ignored output directories.
+
+Native flows live under `maestro/` and run with `npm run test:mobile:e2e` after an
+iOS or Android build is installed.