fix(hooks): register config hooks for serve

[fangliquanflq]

Summary

• register config-owned shell hooks from the shared dashboard/serve runtime after plugin discovery
• cover the lean hermes serve fast path used by the Desktop backend without changing its MCP startup strategy
• keep shell-hook and outbound-webhook config registration on one idempotent helper

Testing

• scripts/run_tests.sh tests/hermes_cli/test_fast_serve_launch.py tests/hermes_cli/test_mcp_startup.py -q (17 passed)

Related Issue

Closes #102504

[alt-glitch]

This was generated by AI during triage.

Duplicate of #69832 — same fix (register config.yaml shell hooks inside the dashboard/serve startup path, including the fast hermes serve launch) for the same bug (#61806 / #69825 / #102504). Other open PRs in this cluster: #85225, #92655, #102151, #102521.

[fangliquanflq]

Confirmed. This PR overlaps #69832 at the same cmd_dashboard startup chokepoint: both register config-owned shell hooks after plugin discovery so the hermes serve fast path is covered before the server starts. The current diff also factors the existing shell-hook/outbound-webhook registration into a shared helper, but that does not make the underlying bug fix distinct. No additional code change is needed in response to this triage note. Evidence reviewed: both PR diffs against main, the serve fast-path dispatch, and the passing required CI on this head.