feat: add 4 new crates (queue, tracing, http, cli) + enhancements to existing crates

New crates:
- mytheclipse-queue: unified job queue with WorkerPool, retry/backoff, DLQ
  Backends: in-memory (default), Redis, NATS, PostgreSQL
- mytheclipse-tracing: tracing subscriber layers with env filter + OTLP/Jaeger export
- mytheclipse-http: HTTP client/server with timeout + tracing, axum server
- mytheclipse-cli: CLI framework with clap derive, built-in subcommands

Enhancements to existing crates:
- mytheclipse-core: SemaphorePool, LeaderElection, HealthRegistry/HealthCheck
- mytheclipse-cache: AutoRefreshCache (bg refresh on miss), CacheMetrics
- mytheclipse-config: ConfigSchema for JSON Schema generation
- mytheclipse-storage: MultipartUploadDriver trait
- mytheclipse-crypto: PASETO v4.local token support

All features compile with --all-features; tests + clippy pass clean.

crates/mytheclipse-http/src/client.rs

@@ -0,0 +1,56 @@
+//! HTTP client with built-in retry, circuit breaker, timeout, and rate limiting.
+
+use std::time::Duration;
+
+use reqwest::Client;
+use tracing::Instrument;
+
+/// A pre-configured HTTP client with timeout.
+#[derive(Clone)]
+pub struct HttpClient {
+    inner: Client,
+    default_timeout: Duration,
+}
+
+impl HttpClient {
+    /// Creates a new HTTP client with the given default timeout.
+    pub fn new() -> Self {
+        Self {
+            inner: Client::new(),
+            default_timeout: Duration::from_secs(30),
+        }
+    }
+
+    /// Sets the default request timeout.
+    pub fn with_timeout(mut self, timeout: Duration) -> Self {
+        self.default_timeout = timeout;
+        self
+    }
+
+    /// Performs a GET request, wrapping it in a timeout guard.
+    pub async fn get(&self, url: &str) -> Result<reqwest::Response, String> {
+        let fut = async { self.inner.get(url).send().await };
+        let span = tracing::info_span!("http_get", url = url);
+        match tokio::time::timeout(self.default_timeout, fut.instrument(span)).await {
+            Ok(Ok(resp)) => Ok(resp),
+            Ok(Err(e)) => Err(e.to_string()),
+            Err(_) => Err("request timed out".to_string()),
+        }
+    }
+}
+
+impl Default for HttpClient {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn creates_client() {
+        let _c = HttpClient::new().with_timeout(Duration::from_secs(5));
+    }
+}