Implement auth procedures with code review fixes

Add complete auth backend (Workstream D):
- Auth middleware for session/API key authentication
- Signup with password or passkey (WebAuthn)
- Login flow with device trust and email confirmation
- Password reset and email verification
- Session management and logout

Utilities created:
- cookies.ts: Cookie helpers and configuration
- crypto.ts: Token generation and hashing
- password.ts: zxcvbn validation, argon2id hashing
- geo.ts: IP/location extraction from headers
- email.ts: Stubbed email sending
- session.ts: Session creation and device trust

Code review improvements applied:
- Use ORPCError instead of Error in procedures
- Add ast-grep rule to enforce ORPCError usage
- Remove error info leakage (generic messages)
- Optimize N+1 query with JOIN in login-password
- Extract signupWithPassword/signupWithPasskey for testability
- Add 15-minute WebAuthn challenge expiry check
- Strengthen CookieOptions type definitions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

bun.lock

@@ -22,11 +22,13 @@
         "@simplewebauthn/server": "^13.2.2",
         "@simplewebauthn/types": "^12.0.0",
         "kysely": "^0.28.2",
+        "zxcvbn": "^4.4.2",
       },
       "devDependencies": {
         "@macalinao/eslint-config": "catalog:",
         "@macalinao/tsconfig": "catalog:",
         "@types/bun": "catalog:",
+        "@types/zxcvbn": "^4.4.5",
         "eslint": "catalog:",
         "typescript": "catalog:",
       },
@@ -454,6 +456,8 @@
 
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@@ -904,6 +908,8 @@
 
     "zod": ["zod@4.3.5", "", {}, "sha512-k7Nwx6vuWx1IJ9Bjuf4Zt1PEllcwe7cls3VNzm4CQ1/hgtFUK2bRNG3rvnpPUhFjmqJKAKtjV576KnUkHocg/g=="],
 
+    "zxcvbn": ["zxcvbn@4.4.2", "", {}, "sha512-Bq0B+ixT/DMyG8kgX2xWcI5jUvCwqrMxSFam7m0lAf78nf04hv6lNCsyLYdyYTrCVMqNDY/206K7eExYCeSyUQ=="],
+
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