chore: bump sdk-libs versions

[ananas-block]

Sdk-libs Release

This PR bumps versions for sdk-libs crates.

Version Bumps

  light-merkle-tree-reference: 3.0.1 → 4.0.0
  light-prover-client: 3.0.0 → 4.0.0
  light-client: 0.15.0 → 0.16.0
  light-event: 0.1.0 → 0.1.1
  light-sdk-macros: 0.15.0 → 0.16.0
  light-program-test: 0.15.0 → 0.16.0
  light-sdk-pinocchio: 0.13.0 → 0.16.0
  light-sdk-types: 0.15.0 → 0.16.0
  light-sdk: 0.15.0 → 0.16.0
  light-sparse-merkle-tree: 0.2.0 → 0.3.0

Release Process

1. Versions bumped in Cargo.toml files
2. PR validation (dry-run) will run automatically
3. After merge, GitHub Action will publish each crate individually to crates.io and create releases

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Generated by scripts/create-release-pr.sh sdk-libs

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch release/sdk-libs

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