Add comprehensive WebAuthn e2e/unit tests and virtual authenticator package

- Create @reviq/virtual-authenticator package with cryptographically valid
  WebAuthn credential generation for testing
- Add e2e tests for WebAuthn registration, authentication, passkey management
- Add unit tests for passkey-helpers and VirtualAuthenticator
- Add security tests for counter replay and tampered responses
- Configure test database environment in devenv.nix
- Add turbo.json test tasks and workspace configuration

Test results: 98 tests passing (54 virtual-authenticator, 25 e2e, 19 unit)

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

bun.lock

@@ -26,8 +26,11 @@
       "devDependencies": {
         "@macalinao/eslint-config": "catalog:",
         "@macalinao/tsconfig": "catalog:",
+        "@reviq/virtual-authenticator": "workspace:*",
         "@types/bun": "catalog:",
+        "@types/pg": "^8.16.0",
         "eslint": "catalog:",
+        "pg": "^8.16.3",
         "typescript": "catalog:",
       },
     },
@@ -134,6 +137,21 @@
         "typescript": "catalog:",
       },
     },
+    "packages/testing/virtual-authenticator": {
+      "name": "@reviq/virtual-authenticator",
+      "version": "0.0.1",
+      "dependencies": {
+        "@simplewebauthn/types": "^12.0.0",
+      },
+      "devDependencies": {
+        "@macalinao/eslint-config": "catalog:",
+        "@macalinao/tsconfig": "catalog:",
+        "@types/bun": "latest",
+        "@types/node": "^25.0.3",
+        "eslint": "catalog:",
+        "typescript": "catalog:",
+      },
+    },
   },
   "catalog": {
     "@macalinao/eslint-config": "^7.0.3",
@@ -334,6 +352,8 @@
 
     "@reviq/db-schema": ["@reviq/db-schema@workspace:packages/db-schema"],
 
+    "@reviq/virtual-authenticator": ["@reviq/virtual-authenticator@workspace:packages/testing/virtual-authenticator"],
+
     "@rollup/rollup-android-arm-eabi": ["@rollup/rollup-android-arm-eabi@4.55.1", "", { "os": "android", "cpu": "arm" }, "sha512-9R0DM/ykwfGIlNu6+2U09ga0WXeZ9MRC2Ter8jnz8415VbuIykVuc6bhdrbORFZANDmTDvq26mJrEVTl8TdnDg=="],
 
     "@rollup/rollup-android-arm64": ["@rollup/rollup-android-arm64@4.55.1", "", { "os": "android", "cpu": "arm64" }, "sha512-eFZCb1YUqhTysgW3sj/55du5cG57S7UTNtdMjCW7LwVcj3dTTcowCsC8p7uBdzKsZYa8J7IDE8lhMI+HX1vQvg=="],