Release v0.2.0

[teodordelibasic-db]

What changes are proposed in this pull request?

New Features

• Type-Safe Stream Classes: New ProtoZerobusStream<T> and JsonZerobusStream with compile-time type safety
• Stream Builder API: Fluent builder pattern with
  sdk.streamBuilder(tableName).clientCredentials(...).compiledProto(...).build()
• JSON Record Support: Direct JSON ingestion without protobuf encoding via JsonZerobusStream
• Batch API with Wrapper Types: MessageBatch, BytesBatch, StringBatch, MapBatch for consistent batch ingestion
• SDK Builder Pattern: ZerobusSdk.builder(serverEndpoint, unityCatalogEndpoint).executor(...).build()
• Headers Provider Support: HeadersProvider interface for custom authentication strategies
• TLS Configuration Support: TlsConfig abstract class for flexible TLS settings
• Extended Proto Type Support: Added TINYINT, BYTE, TIMESTAMP_NTZ, VARIANT, and nested STRUCT support

API Improvements

• New Ingestion API: ingest() and ingestBatch() return offset ID directly (previously CompletableFuture<Void>)
• Wait for Offset: New waitForOffset(long) method for explicit acknowledgment control
• Type Widening: ProtoZerobusStream.ingest(byte[]) and JsonZerobusStream.ingest(Map<String, ?>)
• Unchecked Exceptions: ZerobusException now extends RuntimeException
• Configuration Renames: maxInflightRequests() replaces maxInflightRecords(), offsetCallback() replaces
  ackCallback()

Project Structure

• Multi-Module Maven Project: Reorganized into common/, sdk/, cli/, and sdk/examples/ modules
• New CLI Module: Standalone zerobus-cli JAR with generate-proto command
• New Common Module: Shared HTTP client and JSON utilities
• Runnable Examples: Examples as Maven module with proto compilation

Internal Improvements

• gRPC channel reuse across streams
• SDK-level cached thread pool
• Graceful executor shutdown
• Parameterized SLF4J logging
• JSR-305 nullability annotations

Dependency Updates

• Protocol Buffers: 3.24.0 → 4.33.0
• gRPC: 1.58.0 → 1.76.0
• SLF4J: 1.7.36 → 2.0.17

Deprecations

• ZerobusStream<T> → use ProtoZerobusStream<T> or JsonZerobusStream
• sdk.createStream() → use sdk.streamBuilder()
• TableProperties<T> → use ProtoTableProperties or JsonTableProperties

How is this tested?

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the unit tests (e.g. local tests).

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