[Java] Various improvements and fixes

[danilonajkov-db]

What changes are proposed in this pull request?

This PR contains various improvements and fixes:

1. The JNI nativeClose used .take() which destroyed the Rust stream object, making nativeGetUnackedBatches/nativeGetUnackedRecords always fail afterward. The Java side silently swallowed the error and returned empty lists.
   • Changed nativeClose in both stream.rs and arrow_stream.rs to use .as_mut() (close in place) so the stream stays accessible.
2. Builder validation: Reject negative values for timeouts/backoff/retries and zero/negative for max inflight counts in ArrowStreamConfigurationOptions and StreamConfigurationOptions
3. Null checks on ingestion: Validate record, encodedBytes, json, serializer params in ZerobusProtoStream and ZerobusJsonStream
4. Validate constructor and create*Stream() arguments
5. Deleted unused nativeGetTableName from ZerobusArrowStream
6. getClientId()/getClientSecret() on ZerobusArrowStream now public

How is this tested?

• 14 new unit tests
• 2 new integration tests verifying getUnackedBatches/getUnackedRecords work after close()