🤖 [codex] Honor FIREHOSE_DISABLED when installing the execution extension - #7

FIREHOSE_DISABLED=true currently starts an RPC node and then terminates it when the Firehose execution extension panics with firehose tracer not initialized — call init_tracer first. This was reproduced against dev-049d306-fh3.1-3 while preparing the BSC archive packages for pinax-network/k8s-archive#100 and pinax-network/k8s-archive#103.

Install the extension only when tracer initialization is enabled. The existing NodeBuilder::install_exex_if API preserves the enabled path and avoids starting an extension without its required global state. This targets release/develop-fh, the source of the affected release; the repository's default main is the separate non-Firehose upstream line.

Validation:

• Reproduced the crash with the published image, an empty temporary database, non-root execution and an isolated Docker network.
• Confirmed the conditional builder API in the pinned bnb-reth dependency.
• git diff --check passed.
• Cargo checks and image build run on this PR. The archive PR also boots both network manifests and checks chain ID/genesis, HTTP, WebSocket, metrics and IPC with tracing disabled before Chapel activation.

🤖 Created by Codex GPT-6 (effort: not exposed by runtime)