feat: integrate actual blockchain mining with PoA consensus and fix CLI wallet operations

🔗 Mining Integration:
• Connect mining RPC endpoints to PoA proposer for real block production
• Initialize PoA proposer in app lifespan for mining integration
• Add mining status, start, stop, and stats endpoints with blockchain data
• Track actual block production rate and mining statistics
• Support 1-8 mining threads with proper validation

🔧 PoA Consensus Integration:
• Set global PoA proposer reference for mining operations
• Start

cli/enterprise_cli.py

@@ -102,9 +102,8 @@ def mining_operations(operation: str, wallet_name: str = None, threads: int = 1,
         print(f"Starting mining with wallet '{wallet_name}' using {threads} threads...")
         
         mining_config = {
-            "miner_address": wallet_name,  # Simplified for demo
-            "threads": threads,
-            "enabled": True
+            "proposer_address": wallet_name,  # Fixed field name for PoA
+            "threads": threads
         }
         
         try:
@@ -235,7 +234,7 @@ def ai_operations(operation: str, wallet_name: str = None, job_type: str = None,
         print(f"   Prompt: {prompt[:50]}...")
         
         job_data = {
-            "client_address": wallet_name,  # Simplified for demo
+            "wallet_address": wallet_name,  # Fixed field name
             "job_type": job_type,
             "prompt": prompt,
             "payment": payment

cli/simple_wallet.py

@@ -538,35 +538,35 @@ def submit_ai_job(wallet_name: str, job_type: str, prompt: str, payment: float,
         print(f"Error: {e}")
         return None
     def get_balance(wallet_name: str, keystore_dir: Path = DEFAULT_KEYSTORE_DIR, 
-                rpc_url: str = DEFAULT_RPC_URL) -> Optional[Dict]:
+                    rpc_url: str = DEFAULT_RPC_URL) -> Optional[Dict]:
         """Get wallet balance and transaction info"""
-    try:
-        keystore_path = keystore_dir / f"{wallet_name}.json"
-        if not keystore_path.exists():
-            print(f"Error: Wallet '{wallet_name}' not found")
+        try:
+            keystore_path = keystore_dir / f"{wallet_name}.json"
+            if not keystore_path.exists():
+                print(f"Error: Wallet '{wallet_name}' not found")
+                return None
+            
+            with open(keystore_path) as f:
+                wallet_data = json.load(f)
+            
+            address = wallet_data['address']
+            
+            # Get balance from RPC
+            response = requests.get(f"{rpc_url}/rpc/getBalance/{address}")
+            if response.status_code == 200:
+                balance_data = response.json()
+                return {
+                    "address": address,
+                    "balance": balance_data.get("balance", 0),
+                    "nonce": balance_data.get("nonce", 0),
+                    "wallet_name": wallet_name
+                }
+            else:
+                print(f"Error getting balance: {response.text}")
+                return None
+        except Exception as e:
+            print(f"Error: {e}")
             return None
-        
-        with open(keystore_path) as f:
-            wallet_data = json.load(f)
-        
-        address = wallet_data['address']
-        
-        # Get balance from RPC
-        response = requests.get(f"{rpc_url}/rpc/getBalance/{address}")
-        if response.status_code == 200:
-            balance_data = response.json()
-            return {
-                "address": address,
-                "balance": balance_data.get("balance", 0),
-                "nonce": balance_data.get("nonce", 0),
-                "wallet_name": wallet_name
-            }
-        else:
-            print(f"Error getting balance: {response.text}")
-            return None
-    except Exception as e:
-        print(f"Error: {e}")
-        return None
 
 
 def get_transactions(wallet_name: str, keystore_dir: Path = DEFAULT_KEYSTORE_DIR,