Harden network CLI, blob integrity, and RPC operations

[JROChub]

Summary

• make JULIAN CLI help/version/group behavior reliable and cover it in CI
• make blob fee rejection atomic, serialize registry settlement, and persist registry state with write-sync-rename
• repair smoke, fault, load, and scale-network scripts so failures are real failures and launched nodes remain controllable
• restore canonical systemd units and complete the operations release archive
• add an external JSON-RPC publication gate for chain ID 177155, documentation, and mock tests
• add /power-house/ redirect for the current ChainList information URL

Verification

• cargo clippy --all-targets --all-features --locked -- -D warnings
• cargo test --all-targets --features net --locked (59 library + 6 protocol tests)
• bash scripts/test_cli.sh
• python3 scripts/test_rpc_check.py
• bash scripts/smoke_net.sh
• bash scripts/smoke_net.sh --with-migration
• bash scripts/fault_test.sh
• two-node scale launcher, blob health, metrics/finality, load test, and clean shutdown
• cargo package --locked
• optimized ops archive build and execution

External RPC status

https://indexer.mfenx.com/rpc still fails DNS resolution. This PR deliberately does not merge the old synthetic RPC facade because it is not backed by consensus-finalized chain state. DNS and a canonical RPC backend must be restored before the endpoint can pass scripts/check_rpc.py and be safely advertised to wallets.