base64-ng 2.0.4

[eldryoth]

base64-ng 2.0.4

base64-ng 2.0.4 is a selective maintenance release. The core runtime
implementation, public 2.0 API, MSRV, and SIMD admission decisions are
unchanged.

Changes

• Updates the exact-pinned sanitization companion dependency to 2.1.0 and
  verifies its complete supported feature matrix.
• Updates taiki-e/install-action to 2.87.7 with an immutable commit pin.
• Pins Swatinem/rust-cache 2.9.2 to the signed release tag's target commit.
• Confirms the remaining Rust dependencies, release tools, and GitHub Actions
  are current at release initiation.
• Retains Rust 1.98.1 for active release checks and Rust 1.90.0 as MSRV.
• Publishes only base64-ng and base64-ng-sanitization at 2.0.4. The eleven
  unchanged Rust companions and @valkyoth/base64-ng-wasm-loader remain at
  2.0.3 and continue to accept the compatible core patch.
• Hardens selective release validation against downgrade or major/minor drift
  and gives the independently versioned npm loader an explicit publish entry.
• Blocks selected npm packages under the development-blocked policy before
  any machine-readable publication decision is emitted.

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This discussion was created from the release base64-ng 2.0.4.