fix: resolve port collisions for polygon-amoy and zircuit-garfield

- polygon-amoy: reassigned from port 12188 (collision with hashkeychain-mainnet)
  to 12190 via salt+2 in generate_ports()
- zircuit-garfield/testnet: fix empty --networkid= (was {{ chain_id }},
  now {{ chainid }})

Co-Authored-By: Claude Agent <claude@stakesquid.eu>

polygon/bor/polygon-amoy-bor-pruned-pebble-path.yml

@@ -46,8 +46,8 @@ services:
       nofile: 1048576    # Max open files (for RPC/WS connections)
     user: root
     ports:
-      - 12188:12188
-      - 12188:12188/udp
+      - 12190:12190
+      - 12190:12190/udp
     expose:
       - 8545
       - 6060
@@ -69,7 +69,7 @@ services:
       - --metrics
       - --metrics.prometheus-addr=0.0.0.0:6060
       - --nat=extip:${IP}
-      - --port=12188
+      - --port=12190
       - --rpc.gascap=600000000
       - --rpc.returndatalimit=10000000
       - --rpc.txfeecap=0