refactor: modernize dependency stack and minimize footprint

- Migrate to native 'std::sync' primitives (LazyLock, OnceLock, RwLock).
- Replace 'parking_lot' with std library synchronization types.
- Switch from 'chrono' to 'std::time::SystemTime' for lightweight timestamps.
- Bump core dependencies: tokio (1.50.0) and rustls (0.23.37).
- Decouple 'solana-program' by utilizing 'solana-sdk' re-exports.
- Prune redundant crates: lazy_static, once_cell, chrono, maplit, and parking_lot.
- Remove unused dev-dependencies (criterion) and example-only utils (env_logger).
- Improve compile times and reduce supply chain attack surface.

examples/dynamic_subscription.rs

@@ -21,8 +21,6 @@ const MONITORING_DURATION_SECS: u64 = 10;
 /// Demonstrates dynamic subscription updates and filter changes in real-time
 #[tokio::main]
 async fn main() -> Result<()> {
-    env_logger::init();
-
     println!("Connecting to Yellowstone gRPC at {}", GRPC_ENDPOINT);
     let client =
         Arc::new(YellowstoneGrpc::new(GRPC_ENDPOINT.to_string(), API_KEY.map(|s| s.to_string()))?);