Add GeoIP lookup support and update device fingerprints to base58

- Add maxmind library for GeoIP database lookups when not behind Cloudflare
- Extract client IP from multiple header sources (CF, X-Real-IP, X-Forwarded-For, etc.)
- Change device fingerprints from UUID to base58 with device_ prefix
- Add isValidDeviceFingerprint() that accepts both new and legacy formats
- Colocate unit tests with source files, remove __tests__/unit directory
- Add test coverage reporting to test script

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

bun.lock

@@ -27,6 +27,7 @@
         "@simplewebauthn/server": "^13.2.2",
         "@simplewebauthn/types": "^12.0.0",
         "kysely": "^0.28.2",
+        "maxmind": "^5.0.3",
         "pino": "^10.1.0",
         "postmark": "^4.0.5",
         "zxcvbn": "^4.4.2",
@@ -846,6 +847,8 @@
 
     "math-intrinsics": ["math-intrinsics@1.1.0", "", {}, "sha512-/IXtbwEk5HTPyEwyKX6hGkYXxM9nbj64B+ilVJnC/R6B0pH5G4V3b0pVbL7DBj4tkhBAppbQUlf6F6Xl9LHu1g=="],
 
+    "maxmind": ["maxmind@5.0.3", "", { "dependencies": { "mmdb-lib": "3.0.1", "tiny-lru": "11.4.5" } }, "sha512-oMtZwLrsp0LcZehfYKIirtwKMBycMMqMA1/Dc9/BlUqIEtXO75mIzMJ3PYCV1Ji+BpoUCk+lTzRfh9c+ptGdyQ=="],
+
     "micromatch": ["micromatch@4.0.8", "", { "dependencies": { "braces": "^3.0.3", "picomatch": "^2.3.1" } }, "sha512-PXwfBhYu0hBCPw8Dn0E+WDYb7af3dSLVWKi3HGv84IdF4TyFoC0ysxFd0Goxw7nSv4T/PzEJQxsYsEiFCKo2BA=="],
 
     "mime-db": ["mime-db@1.52.0", "", {}, "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg=="],
@@ -856,6 +859,8 @@
 
     "minimist": ["minimist@1.2.8", "", {}, "sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA=="],
 
+    "mmdb-lib": ["mmdb-lib@3.0.1", "", {}, "sha512-dyAyMR+cRykZd1mw5altC9f4vKpCsuywPwo8l/L5fKqDay2zmqT0mF/BvUoXnQiqGn+nceO914rkPKJoyFnGxA=="],
+
     "mri": ["mri@1.2.0", "", {}, "sha512-tzzskb3bG8LvYGFF/mDTpq3jpI6Q9wc3LEmBaghu+DdCssd1FakN7Bc0hVNmEyGq1bq3RgfkCb3cmQLpNPOroA=="],
 
     "mrmime": ["mrmime@2.0.1", "", {}, "sha512-Y3wQdFg2Va6etvQ5I82yUhGdsKrcYox6p7FfL1LbK2J4V01F9TGlepTIhnK24t7koZibmg82KGglhA1XK5IsLQ=="],
@@ -1024,6 +1029,8 @@
 
     "thread-stream": ["thread-stream@3.1.0", "", { "dependencies": { "real-require": "^0.2.0" } }, "sha512-OqyPZ9u96VohAyMfJykzmivOrY2wfMSf3C5TtFJVgN+Hm6aj+voFhlK+kZEIv2FBh1X6Xp3DlnCOfEQ3B2J86A=="],
 
+    "tiny-lru": ["tiny-lru@11.4.5", "", {}, "sha512-hkcz3FjNJfKXjV4mjQ1OrXSLAehg8Hw+cEZclOVT+5c/cWQWImQ9wolzTjth+dmmDe++p3bme3fTxz6Q4Etsqw=="],
+
     "tinyglobby": ["tinyglobby@0.2.15", "", { "dependencies": { "fdir": "^6.5.0", "picomatch": "^4.0.3" } }, "sha512-j2Zq4NyQYG5XMST4cbs02Ak8iJUdxRM0XI5QyxXuZOzKOINmWurp3smXu3y5wDcJrptwpSjgXHzIQxR0omXljQ=="],
 
     "to-regex-range": ["to-regex-range@5.0.1", "", { "dependencies": { "is-number": "^7.0.0" } }, "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ=="],