Extracted the 1,577-line monolithic `server/main.test.ts` into five isolated, domain-specific files under `server/tests/`:
- `forward_auth.test.ts`: ForwardAuth bypass, cookie scoping, and sandbox.
- `rpc.test.ts`: ConnectRPC SPIFFE and RBAC tests.
- `auth.test.ts`: Audit ledger, WebAuthn PRF, passkey magic links.
- `events.test.ts`: Multi-claim join endpoints and killswitch.
- `scopes.test.ts`: Zero-trust guards and self-revocations.
Successfully maintained all tests cleanly isolated via standard mocking and deleted `main.test.ts` after migrating and executing `deno test --allow-all` with zero failures.
Co-authored-by: mrteye <1945243+mrteye@users.noreply.github.com>
