Add support for Apache Iceberg REST Catalog specification

[HJLebbink]

This PR implements the MinIO S3 Tables API based on the Apache Iceberg REST Catalog specification, providing a complete Rust SDK for Iceberg table operations on MinIO.

Features

Core Iceberg REST Catalog API

Warehouse Management:

• Create, list, get, delete warehouses
• Warehouse-level encryption, policies, metrics, replication, storage class configuration

Namespace Management:

• Create, list, get, delete namespaces (with multi-level namespace support)
• Update namespace properties
• Namespace existence checks

Table Management:

• Create, delete, load, register, rename tables
• Table existence checks and metadata operations
• Table-level encryption, policies, replication, maintenance, expiration, storage class
• Table metrics and monitoring

View Management:

• Create, load, register, replace, rename, drop views
• View versions and SQL dialect support
• View existence checks

Scan Planning:

• Plan table scans with filters and projections
• Fetch scan tasks and planning results
• Cancel ongoing planning operations

Advanced Operations:

• Commit table transactions (atomic multi-statement operations)
• Multi-table transactions
• Tagging support (tag/untag/list tags for resources)

[Copilot]

Pull request overview

This PR introduces S3 Tables support to the MinIO Rust SDK, implementing a comprehensive Apache Iceberg REST Catalog client with warehouse management, namespace operations, table/view lifecycle, and query planning capabilities.

Key changes:

• New s3tables module with full Iceberg REST API implementation
• Builder pattern for all operations with typed-builder support
• Pluggable authentication (SigV4, Bearer, NoAuth)
• Performance optimizations (signing key cache, zero-copy streaming, multimap improvements)
• Enhanced checksum support (CRC32/C, CRC64-NVME, SHA1/256)

Reviewed changes

Copilot reviewed 79 out of 221 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/s3tables/builders/*.rs	Request builders for Tables API operations (warehouses, namespaces, tables, views)
src/s3tables/auth.rs	Authentication providers for different catalog backends (SigV4, Bearer, NoAuth)
src/s3tables/advanced/*.rs	Advanced operations for direct Iceberg metadata manipulation
src/s3/utils.rs	Checksum utilities (CRC32/C/64, SHA1/256) for data integrity verification
src/s3/signer.rs	Signing key cache for performance optimization
src/s3/client/mod.rs	HTTP/2 support, connection pooling, fast-path GET, region lookup skip
src/s3/multimap_ext.rs	Optimized header canonicalization (regex removal, pre-allocation)
examples/s3tables/*.rs	Example programs and stress tests for Tables API

Comments suppressed due to low confidence (1)

src/s3/client/mod.rs:1

• This TODO comment in test code should either be addressed or removed. If the test is known to be broken or unnecessary, it should be fixed or deleted rather than left with an unresolved TODO.

// MinIO Rust Library for Amazon S3 Compatible Cloud Storage

[Copilot]

Pull request overview

Copilot reviewed 77 out of 231 changed files in this pull request and generated 5 comments.

[Copilot]

Pull request overview

Copilot reviewed 196 out of 313 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

src/s3tables/advanced/response/commit_multi_table_transaction.rs:1

• This CommitMultiTableTransactionResponse definition is effectively a duplicate of the one in src/s3tables/response/commit_multi_table_transaction.rs, which increases maintenance burden and risk of the two versions diverging. Consider reusing a single definition (e.g., via a pub use or a type alias from the advanced module to the base response) instead of maintaining two separate but identical structs.

[HJLebbink]

Apache Iceberg support in MinIO-rs. If someone needs it, here it is.

[twuebi]

Why would I use this over iceberg-rust?