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Optimize performRemoteJarInspection by using CharStreams for efficient reading and breaking early after finding the target file. This improves performance and fixes a potential UTF-8 decoding bug.


PR created automatically by Jules for task 14651426827125877231 started by @menny

💡 What:
- Replaced manual byte buffering loop with `CharStreams.toString` using `InputStreamReader`.
- Added early `break` after finding `META-INF/services/javax.annotation.processing.Processor`.

🎯 Why:
- The previous implementation constructed a String for every 1024 bytes read, which is inefficient.
- It also incorrectly handled multi-byte UTF-8 characters if they were split across buffer boundaries.
- Scanning the entire JAR after finding the target file was unnecessary O(N) work.

📊 Impact:
- Stops reading JAR immediately after finding the processor config (O(1) vs O(N) file reads).
- Fixes potential data corruption for multi-byte characters.
- Reduces object allocation during file reading.

🔬 Measurement:
- Verified with `bazel test //resolver:classifiers_test`.
- Logic correctness confirmed by existing tests passing.
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