fix: wrap async ChainManager calls with asyncio.run and update exchange endpoints to use /api/v1 prefix

- Add asyncio.run() wrapper to get_chain_info, delete_chain, and add_chain_to_node calls in chain.py
- Update all exchange command endpoints from /exchange/* to /api/v1/exchange/* for API consistency
- Mark blockchain block command as fixed in CLI checklist (uses local node)
- Mark all chain management commands help as available (backup, delete, migrate, remove, restore)
- Mark client batch-submit

cli/aitbc_cli/commands/exchange.py

@@ -23,7 +23,7 @@ def rates(ctx):
     try:
         with httpx.Client() as client:
             response = client.get(
-                f"{config.coordinator_url}/exchange/rates",
+                f"{config.coordinator_url}/api/v1/exchange/rates",
                 timeout=10
             )
             
@@ -65,7 +65,7 @@ def create_payment(ctx, aitbc_amount: Optional[float], btc_amount: Optional[floa
     try:
         with httpx.Client() as client:
             rates_response = client.get(
-                f"{config.coordinator_url}/exchange/rates",
+                f"{config.coordinator_url}/api/v1/exchange/rates",
                 timeout=10
             )
             
@@ -94,7 +94,7 @@ def create_payment(ctx, aitbc_amount: Optional[float], btc_amount: Optional[floa
             
             # Create payment
             response = client.post(
-                f"{config.coordinator_url}/exchange/create-payment",
+                f"{config.coordinator_url}/api/v1/exchange/create-payment",
                 json=payment_data,
                 timeout=10
             )
@@ -124,7 +124,7 @@ def payment_status(ctx, payment_id: str):
     try:
         with httpx.Client() as client:
             response = client.get(
-                f"{config.coordinator_url}/exchange/payment-status/{payment_id}",
+                f"{config.coordinator_url}/api/v1/exchange/payment-status/{payment_id}",
                 timeout=10
             )
             
@@ -158,7 +158,7 @@ def market_stats(ctx):
     try:
         with httpx.Client() as client:
             response = client.get(
-                f"{config.coordinator_url}/exchange/market-stats",
+                f"{config.coordinator_url}/api/v1/exchange/market-stats",
                 timeout=10
             )