fix(ci): macOS deployment target for jthread, Windows vcpkg cmake

- macOS: Set MACOSX_DEPLOYMENT_TARGET=11.0 to enable std::jthread
  (libc++ requires macOS 11+ for LLVM 11 sync primitives)
- Windows MSVC: Use --cmake-prefix-path for vcpkg sqlite3 detection
- Windows MSVC: Add unofficial-sqlite3 cmake module lookup (vcpkg naming)
- Windows MSVC: Add vcpkg bin to PATH for test DLL resolution

Author: trvon

.github/workflows/ci.yml

@@ -150,13 +150,18 @@ jobs:
           brew install meson ninja pkg-config sqlite
 
       - name: Configure
+        env:
+          # macOS 11.0+ required for std::jthread (libc++ LLVM 11 sync primitives)
+          MACOSX_DEPLOYMENT_TARGET: '11.0'
         run: |
           meson setup build \
             -Dbuildtype=debugoptimized \
             -Denable_simd_avx=false \
             -Denable_simd_neon=true
 
       - name: Build
+        env:
+          MACOSX_DEPLOYMENT_TARGET: '11.0'
         run: meson compile -C build
 
       - name: Test
@@ -185,17 +190,21 @@ jobs:
           C:\vcpkg\vcpkg install sqlite3:x64-windows
 
       - name: Configure
+        env:
+          CMAKE_PREFIX_PATH: C:\vcpkg\installed\x64-windows
         run: |
           meson setup build `
             -Dbuildtype=debugoptimized `
             -Denable_simd_avx=false `
             -Denable_simd_neon=false `
-            --pkg-config-path=C:\vcpkg\installed\x64-windows\lib\pkgconfig
+            --cmake-prefix-path=C:\vcpkg\installed\x64-windows
 
       - name: Build
         run: meson compile -C build
 
       - name: Test
+        env:
+          PATH: C:\vcpkg\installed\x64-windows\bin;${{ env.PATH }}
         run: meson test -C build
 
   # =============================================================================

meson.build

@@ -199,14 +199,20 @@ endif
 
 # SQLite3 dependency
 # Try multiple methods to find SQLite3:
-# 1. pkg-config (Unix-y systems)
-# 2. cmake (Windows with vcpkg, some Unix systems)
-# 3. system (fallback)
+# 1. pkg-config (Unix-y systems, MinGW)
+# 2. cmake with unofficial-sqlite3 (vcpkg on Windows)
+# 3. cmake with sqlite3 (some systems)
+# 4. system (fallback - lets meson try everything)
 sqlite3_dep = dependency('sqlite3', version: '>=3.38.0', required: false, method: 'pkg-config')
+if not sqlite3_dep.found()
+  # vcpkg uses 'unofficial-sqlite3' as the cmake package name
+  sqlite3_dep = dependency('unofficial-sqlite3', required: false, method: 'cmake', modules: ['unofficial::sqlite3::sqlite3'])
+endif
 if not sqlite3_dep.found()
   sqlite3_dep = dependency('sqlite3', version: '>=3.38.0', required: false, method: 'cmake')
 endif
 if not sqlite3_dep.found()
+  # Final fallback - let meson try all methods
   sqlite3_dep = dependency('sqlite3', version: '>=3.38.0', required: true)
 endif