fix(ci): Fix Eigen3 version compatibility and macOS runner in publish workflow

- CMakeLists.txt: Fall back to FetchContent when system Eigen3 is
  incompatible (Homebrew ships Eigen 5.x which fails version check)
- publish.yml: Replace deprecated macos-13 with macos-15 runner
- publish.yml: Add fail-fast: false to prevent one platform failure
  from canceling all wheel builds

Author: libraz

.github/workflows/publish.yml

@@ -61,6 +61,7 @@ jobs:
 
   python-wheels:
     strategy:
+      fail-fast: false
       matrix:
         include:
           - os: ubuntu-latest
@@ -75,7 +76,7 @@ jobs:
             arch: arm64
             plat_tag: macosx_11_0_arm64
             lib_name: libsonare.dylib
-          - os: macos-13
+          - os: macos-15
             arch: x86_64
             plat_tag: macosx_10_15_x86_64
             lib_name: libsonare.dylib

CMakeLists.txt

@@ -40,8 +40,9 @@ if(ENABLE_COVERAGE)
 endif()
 
 # Eigen3
-if(BUILD_WASM)
-  # For WASM, use FetchContent to get Eigen3
+find_package(Eigen3 3.3 QUIET NO_MODULE)
+if(NOT Eigen3_FOUND)
+  # Fallback: fetch Eigen3 (for WASM or when system Eigen is incompatible)
   include(FetchContent)
   FetchContent_Declare(
     Eigen3
@@ -50,8 +51,6 @@ if(BUILD_WASM)
     GIT_SHALLOW TRUE
   )
   FetchContent_MakeAvailable(Eigen3)
-else()
-  find_package(Eigen3 3.3 REQUIRED NO_MODULE)
 endif()
 
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