fix(connector): explicit error conversion in cdc reader try-block (2026-01-19)

Same class as the rpc_client fix: newer rustc no longer auto-applies the
`jni::errors::Error -> anyhow::Error` conversion at `?` inside a `try` block.
Make it explicit via `.map_err(anyhow::Error::from)`.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: TennyZhuang

src/connector/src/source/cdc/source/reader.rs

@@ -113,9 +113,9 @@ impl<T: CdcSourceTypeTrait> SplitReader for CdcSplitReader<T> {
         std::thread::spawn(move || {
             execute_with_jni_env(jvm, |env| {
                 let result: anyhow::Result<_> = try {
-                    let get_event_stream_request_bytes = env.byte_array_from_slice(
-                        &Message::encode_to_vec(&get_event_stream_request),
-                    )?;
+                    let get_event_stream_request_bytes = env
+                        .byte_array_from_slice(&Message::encode_to_vec(&get_event_stream_request))
+                        .map_err(anyhow::Error::from)?;
                     (env, get_event_stream_request_bytes)
                 };