fix(macos): support release and CI KDF artefacts

[CharlVS]

Summary

• normalize macOS KDF archives into a canonical layout before marking them current
• prefer GitHub release libkdf-* artefacts first, while still accepting CI/mirror kdf-* artefacts when they validate
• update the macOS podspec to support executable, dylib, and static-library packaging with one code path

Root Cause

The macOS release artefact for KDF commit d56a7bc is published as libkdf-macos-universal2-<hash>.zip and contains libkdflib.a, but the active Flutter plugin podspec only accepted bin/kdf or lib/libkdflib.dylib. That made release-candidate builds fail even though compatible CI-style executable archives still existed on mirrors.

Impact

• macOS builds now work with both GitHub release and CI-built KDF artefacts
• GitHub releases remain the primary source of truth by source order and filename preference
• incompatible macOS archives fall through to the next source instead of surfacing later as an Xcode failure

Validation

• dart test in packages/komodo_wallet_build_transformer
• dart analyze lib/src/native/kdf_executable_finder.dart lib/src/operations/kdf_operations_native.dart in packages/komodo_defi_framework
  • only pre-existing infos remained in those two files

[github-actions]

Visit the preview URL for this PR (updated for commit 46bd73f):

https://komodo-playground--pr347-fix-macos-kdf-findin-wac4cduw.web.app

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