feat: add hlz watch command for price alerts with shell triggers#4
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feat: add hlz watch command for price alerts with shell triggers#4
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- Validate coin exists on first allMids message; fail fast with error for unknown/mistyped coins instead of hanging silently. - In JSON/pipe mode, suppress child process stdout (.Ignore) so shell command output does not corrupt the machine-readable JSON stream. Child stderr still goes to stderr for diagnostics.
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Add hlz watch command, a WebSocket-based price watcher that monitors mid price and optionally executes a shell command when a threshold is crossed.
Features: