Omnigraph: Pothos Instrumentation

[shrugs]

• add otel tracing and timings https://pothos-graphql.dev/docs/plugins/tracing#opentelemetry
• find-domains is probably slow as shit hence subdomains being slow af. likely need to re-architect as in Handle conflicts while indexing and resolving names across the L1 registry / L2 "shadow registries" / subregistries #205
  • slowness clearly related to index size, but incurring costs on v1-only traversals, so perhaps just an issue with find-domains structure
  • need to take a PLAN and shove it into claude

[shrugs]

closing after #1855