Feat/2498 grpc protocol - #2499

This is just a copy of #2462

What does this PR do?

This PR introduces full gRPC support for ArcadeDB, providing a strongly-typed, high-performance API for remote access to the database.

Key highlights include:

• Streaming query execution with multiple retrieval modes:

  • CURSOR – existing behavior, iterating and streaming results as they are retrieved.
  • MATERIALIZE_ALL – materializes all results before streaming in batches.
  • PAGED – reissues queries per batch using LIMIT/SKIP for efficient paging.

• Insert operations:

  • BulkInsert – single request for large batch inserts.
  • InsertStream – client-streaming bulk insert with server-side batching and acknowledgements.
  • InsertBidirectional – full duplex insert mode with per-batch acknowledgements and commit/rollback control.

• Record operations:

  • Create, update, and lookup records with schema-aware property handling (including embedded and list properties).

• Transaction support:

  • Added TransactionContext flags for begin, commit, and rollback to coordinate transactional operations across requests.
  • Enhanced type conversion utilities for safe proto ↔︎ Java object mapping, including embedded documents and collections.

• Client-side API:

  • Full client-side implementation in RemoteGrpcDatabase with a simple, extensible API.

Motivation

• To provide a native, efficient, and type-safe remote API for ArcadeDB that goes beyond REST/HTTP performance and reliability limitations.
• To support streaming use cases and bulk data ingestion for high-volume workloads.
• To align ArcadeDB with modern distributed and reactive application architectures where gRPC is the standard for service-to-service communication.
• To improve developer experience with generated client stubs and auto-completion.

Related issues

N/A

Additional Notes

I don't yet have a set of client-side tests. These will be provided shortly.

Checklist

• mvn -DskipTests install
• Create a Docker image with mvn clean package -Pdocker in the package module