refactor(backend): clean up models setup, improve ip utils, add adr docs

- Extract ADR documents for architectural decisions (SQLite, FastAPI, React, APScheduler, Scheduler)
- Refactor setup.py: improve code structure and readability
- Add IP validation utilities with test coverage
- Update frontend components (BanTable, HistoryPage)
- Add pre-commit hooks and CONTRIBUTING.md
- Add .editorconfig for consistent coding standards

frontend/package-lock.json

@@ -37,6 +37,7 @@
         "eslint-config-prettier": "^9.1.0",
         "eslint-plugin-react": "^7.37.5",
         "eslint-plugin-react-hooks": "^5.0.0",
+        "husky": "^9.1.7",
         "jiti": "^2.6.1",
         "jsdom": "^28.1.0",
         "openapi-typescript": "^7.13.0",
@@ -6152,6 +6153,22 @@
         "node": ">= 14"
       }
     },
+    "node_modules/husky": {
+      "version": "9.1.7",
+      "resolved": "https://registry.npmjs.org/husky/-/husky-9.1.7.tgz",
+      "integrity": "sha512-5gs5ytaNjBrh5Ow3zrvdUUY+0VxIuWVL4i9irt6friV+BqdCfmV11CQTWMiBYWHbXhco+J1kHfTOUkePhCDvMA==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "husky": "bin.js"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/typicode"
+      }
+    },
     "node_modules/ignore": {
       "version": "7.0.5",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-7.0.5.tgz",