Proposed Change

Problem Description

Currently, Iceberg Kafka Connect only commits based on a fixed time interval (300,000ms by default). This can lead to:

1. Delayed commits when data volume is low
2. Memory pressure when data volume is high
3. Suboptimal performance in varying workload scenarios

Proposed Enhancement

Add additional commit triggers similar to Kafka's approach:

Current Behavior

private static final int COMMIT_INTERVAL_MS_DEFAULT = 300_000; // Only time-based


### Proposal document

_No response_

### Specifications

- [ ] Table
- [ ] View
- [ ] REST
- [ ] Puffin
- [ ] Encryption
- [x] Other