prune: regenerate matching-version .prune.yml + add avalanche offline-pruning

Fixes prune-version drift that corrupted nodes (prune ran an older nitro binary
than the node). All .prune.yml now regenerate from the same config as the normal
compose via client_needs_prune.

- arb nitro: nova/one/sepolia .prune.yml bumped to the node's version (v3.10.1)
- avalanche: add .prune.yml variants that mount a /config/prune chain-config with
  offline-pruning-enabled, plus avalanche/{mainnet,fuji}/prune/C/config.json
- archive profiles are excluded (db_type==pruned gate) so they are never pruned

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

avalanche/fuji/prune/C/config.json

@@ -0,0 +1,6 @@
+{
+    "rpc-gas-cap": 2500000000,
+    "eth-rpc-gas-limit": 2500000000,
+    "offline-pruning-enabled": true,
+    "offline-pruning-data-directory": "/root/.avalanchego/offline-pruning"
+}