Add LLM endpoints, web frontend, and rate limiting config

- Added OpenAI-compatible LLM endpoints to API backend - Introduced web
frontend with Jinja2 templates and static assets - Implemented API proxy
routes in web service - Added sample db.json data for items, users,
orders, reviews, categories, llm_requests - Updated ADC and Helm configs
for separate AI and standard rate limiting - Upgraded FastAPI, Uvicorn,
and added httpx, Jinja2, python-multipart dependencies - Added API
configuration modal and client-side JS for web app

api/db.json

@@ -0,0 +1,199 @@
+{
+  "items": [
+    {
+      "id": 1,
+      "name": "Gaming Laptop RTX 4090",
+      "description": "High-performance gaming laptop with RTX 4090",
+      "price": 2999.99,
+      "in_stock": true,
+      "category": "electronics",
+      "tags": ["gaming", "laptop", "nvidia"]
+    },
+    {
+      "id": 2,
+      "name": "Mechanical Keyboard RGB",
+      "description": "Cherry MX switches with RGB backlighting",
+      "price": 149.99,
+      "in_stock": true,
+      "category": "peripherals",
+      "tags": ["keyboard", "mechanical", "rgb"]
+    },
+    {
+      "id": 3,
+      "name": "Wireless Gaming Mouse",
+      "description": "25K DPI wireless gaming mouse",
+      "price": 89.99,
+      "in_stock": false,
+      "category": "peripherals",
+      "tags": ["mouse", "wireless", "gaming"]
+    },
+    {
+      "id": 4,
+      "name": "4K Gaming Monitor 32\"",
+      "description": "144Hz refresh rate, HDR support",
+      "price": 599.99,
+      "in_stock": true,
+      "category": "displays",
+      "tags": ["monitor", "4k", "gaming"]
+    },
+    {
+      "id": 5,
+      "name": "Gaming Headset 7.1",
+      "description": "Surround sound gaming headset with noise cancellation",
+      "price": 129.99,
+      "in_stock": true,
+      "category": "audio",
+      "tags": ["headset", "audio", "gaming"]
+    }
+  ],
+  "users": [
+    {
+      "id": 1,
+      "username": "john_doe",
+      "email": "john@example.com",
+      "active": true,
+      "role": "user",
+      "created_at": "2024-01-15T10:30:00Z"
+    },
+    {
+      "id": 2,
+      "username": "jane_smith",
+      "email": "jane@example.com",
+      "active": true,
+      "role": "admin",
+      "created_at": "2024-02-20T14:22:00Z"
+    },
+    {
+      "id": 3,
+      "username": "bob_wilson",
+      "email": "bob@example.com",
+      "active": false,
+      "role": "user",
+      "created_at": "2024-03-10T09:15:00Z"
+    },
+    {
+      "id": 4,
+      "username": "alice_johnson",
+      "email": "alice@example.com",
+      "active": true,
+      "role": "moderator",
+      "created_at": "2024-04-05T16:45:00Z"
+    }
+  ],
+  "orders": [
+    {
+      "id": 1,
+      "user_id": 1,
+      "items": [
+        {"item_id": 1, "quantity": 1, "price": 2999.99},
+        {"item_id": 2, "quantity": 1, "price": 149.99}
+      ],
+      "total": 3149.98,
+      "status": "shipped",
+      "created_at": "2024-09-15T12:00:00Z"
+    },
+    {
+      "id": 2,
+      "user_id": 2,
+      "items": [
+        {"item_id": 4, "quantity": 2, "price": 599.99}
+      ],
+      "total": 1199.98,
+      "status": "delivered",
+      "created_at": "2024-09-20T15:30:00Z"
+    },
+    {
+      "id": 3,
+      "user_id": 4,
+      "items": [
+        {"item_id": 5, "quantity": 1, "price": 129.99},
+        {"item_id": 3, "quantity": 1, "price": 89.99}
+      ],
+      "total": 219.98,
+      "status": "pending",
+      "created_at": "2024-10-01T10:15:00Z"
+    }
+  ],
+  "reviews": [
+    {
+      "id": 1,
+      "item_id": 1,
+      "user_id": 1,
+      "rating": 5,
+      "comment": "Amazing laptop! Best purchase ever!",
+      "created_at": "2024-09-20T14:30:00Z"
+    },
+    {
+      "id": 2,
+      "item_id": 2,
+      "user_id": 2,
+      "rating": 4,
+      "comment": "Great keyboard, but a bit loud",
+      "created_at": "2024-09-22T09:45:00Z"
+    },
+    {
+      "id": 3,
+      "item_id": 4,
+      "user_id": 2,
+      "rating": 5,
+      "comment": "Crystal clear display, perfect for gaming",
+      "created_at": "2024-09-25T18:20:00Z"
+    },
+    {
+      "id": 4,
+      "item_id": 5,
+      "user_id": 4,
+      "rating": 4,
+      "comment": "Good sound quality, comfortable to wear",
+      "created_at": "2024-10-02T11:00:00Z"
+    }
+  ],
+  "categories": [
+    {
+      "id": 1,
+      "name": "electronics",
+      "description": "Electronic devices and gadgets"
+    },
+    {
+      "id": 2,
+      "name": "peripherals",
+      "description": "Computer peripherals and accessories"
+    },
+    {
+      "id": 3,
+      "name": "displays",
+      "description": "Monitors and display devices"
+    },
+    {
+      "id": 4,
+      "name": "audio",
+      "description": "Audio devices and accessories"
+    }
+  ],
+  "llm_requests": [
+    {
+      "id": 1,
+      "user_id": 1,
+      "model": "videogame-expert",
+      "prompt": "What are the best RPG games of 2024?",
+      "tokens_used": 250,
+      "timestamp": "2024-10-05T10:00:00Z"
+    },
+    {
+      "id": 2,
+      "user_id": 2,
+      "model": "videogame-expert",
+      "prompt": "Recommend me games similar to Dark Souls",
+      "tokens_used": 180,
+      "timestamp": "2024-10-05T11:30:00Z"
+    },
+    {
+      "id": 3,
+      "user_id": 1,
+      "model": "videogame-expert",
+      "prompt": "What's the best strategy for Elden Ring bosses?",
+      "tokens_used": 320,
+      "timestamp": "2024-10-05T14:15:00Z"
+    }
+  ]
+}