knowledgepixels / nanopub-query / 24127353986

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fix: prevent event loop blocking from network I/O and lock contention

- Cache nanopub lookups in GrlcSpec to avoid blocking GetNanopub.get()
  calls on the Vert.x event loop for every API request
- Wrap /, /pubkeys, /types handlers in executeBlocking to prevent
  getRepositoryNames() HTTP calls from blocking the event loop
- Make StatusController.getState() lock-free with volatile fields
- Increase HTTP fetch timeouts from 1s to 10s

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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