chore(release): prepare v0.9.2

[melonamin]

Summary

• Align Rust workspace, npm core, private React workspace, and bundled WASM versions at 0.9.2.
• Rebuild the bundled WASM and move the prebuilt CLI binary entry into the 0.9.2 changelog.
• Update the README now that binary releases are ready.

Validation

• just build-wasm
• yarn workspace @pondpilot/flowscope-core build:no-wasm
• yarn workspace @pondpilot/flowscope-react build
• just check
• just pre-release
• Real Chromium WASM integration: version 0.9.2, analysis and MSSQL GO checks passed.
• flowscope --version: 0.9.2; npm pack dry run includes the rebuilt WASM.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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