Merge pull request #401 from PR0M3TH3AN/agents/weekly/race-condition-2026-02-21-5109170834766607482

fix(scheduler): resolve relay health and publisher race conditions

src/context/CONTEXT_2026-02-21_race-condition.md

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+# Race Condition Context - 2026-02-21
+
+## Overview
+This run focused on identifying and fixing race conditions in background services, specifically related to `nostr-tools` interactions and WebSocket resource management.
+
+## Goals
+- Identify resource leaks in long-running processes (scheduler/relays).
+- Prevent unhandled promise rejections that could destabilize the application.
+
+## Constraints
+- Must not introduce new dependencies.
+- Must preserve existing retry logic and health check behavior.
+
+## Assumptions
+- `nostr-tools` implementation of `pool.publish` does not support `AbortSignal` for cancellation.
+- WebSocket connections in `relay-health.mjs` are the primary source of file descriptor leaks if not closed on timeout.
+
+## Changes
+- `src/relay-health.mjs`: Added explicit `ws.close()` in `catch` blocks for timeout scenarios.
+- `src/lock-publisher.mjs`: Added `.catch(() => {})` to publish promises to suppress unhandled rejections.