feat: admissible-response hook with relay forwarding

[Lucifer0x17]

Summary

• dev_cache:expected_response extracts http-reference from the admissible config and builds a forward body with reference, status-class, and event tags
• Optional commit-hook-response flag in store config signs the forward body before relay
• Fix parallel default in multinode_env test helper

Context

This enables the NASA route monitoring flow where gateway responses pass through admissibility checks and then get relayed to a monitor process with the http-reference (which node responded) and status-class for per-route scoring.

Config:

{
    "store": [
        {
            "ao-types": "store-module=atom,parallel=atom",
            "store-module": "hb_store_remote_node",
            "nodes": [
                {
                    "prefix": "https://node-b.arhub.asia",
                    "opts": {
                        "http-reference": "node-b"
                    }
                },
                {
                    "prefix": "https://node-a.arhub.asia",
                    "opts": {
                        "http-reference": "node-a"
                    }
                }
            ],
            "parallel": true,
            "commit-hook-response": true,
            "on": {
                "~cache@1.0": {
                    "admissible-response": [
                        {
                            "device": "relay@1.0",
                            "path": "call",
                            "method": "POST",
                            "peer": "http://localhost:9001",
                            "relay-path": "/XJywXqtCp8-50ljBShrBqGKMSPb8OAjBuPnl0KFMvRo/push"
                        }
                    ]
                }
            }
        }
    ]
}