Shared-compute node silently dropped when home relay not in MESH_LLM_DEFAULT_RELAYS

[JoshuaCalhoon]

Describe the bug
A healthy mesh-llm node is silently dropped by default, due to the MESH_LLM_DEFAULT_RELAYS constant listing only 2 relays.

Steps to reproduce

1. Run a headless mesh-llm serve (relays enabled, i.e. no
   --disable-iroh-relays) that homes onto use1-1 or euc1-1 — confirm via
   the endpoint token in GET :<console>/api/status (decode the base64url
   token; look at the Relay addr).
2. Admit that node's npub to a closed relay and connect a stock Buzz desktop
   (Default mode, BUZZ_MESH_IROH_RELAYS unset) as an admitted member.
3. The desktop discovers the node's status note but never lists it as an
   available shared-compute target; agent mentions fail with "no live member is
   serving this model."

Expected behavior
It should allow the default iroh relays by default.

Version and platform

• Buzz version: 0.5.18 (client), mesh-llm v0.75.1 (compute server)
• OS: macOS 27.0 build 26A5406e (client), Gentoo Linux w/kernel 6.18.39 (compute server)

[micspiral]

thanks @JoshuaCalhoon yeah - I can see what is going on here, will patch it up, buzz has its own list of allowed relays which drifted, working on the strategy for this, trying to work out what is best. thanks for this.

[micspiral]

this should be fixed by: #6189