Fix Windows diagnostic paths and schema fixture timeout

cmake/BuildService.cmake

@@ -23,5 +23,12 @@ if(BUILD_TESTING)
   target_link_libraries(faset_build_schema_tests PRIVATE faset_build_service faset_authoring faset_editor_commands)
   add_dependencies(faset_build_schema_tests faset_build_schema_tool)
   add_test(NAME build_schema_publication COMMAND faset_build_schema_tests $<TARGET_FILE:faset_build_schema_tool> ${PROJECT_SOURCE_DIR})
-  set_tests_properties(build_schema_publication PROPERTIES TIMEOUT 60)
+  # This fixture performs many full cache invalidations and process launches.
+  # Windows runner startup and antivirus overhead exceed 60 seconds even when
+  # individual native fixture commands finish normally.
+  if(WIN32)
+    set_tests_properties(build_schema_publication PROPERTIES TIMEOUT 240)
+  else()
+    set_tests_properties(build_schema_publication PROPERTIES TIMEOUT 60)
+  endif()
 endif()

src/editor/build_diagnostics.cpp

@@ -28,7 +28,9 @@ std::string strip_ansi(std::string_view text) {
 }
 std::string normalize_path(std::string path) {
     std::replace(path.begin(), path.end(), '\\', '/');
-    path = std::filesystem::path(path).lexically_normal().generic_string();
+    // Compiler output is UTF-8. Constructing a path from a narrow string on
+    // Windows can decode it through the process code page and lose Unicode.
+    path = generic_path_to_utf8(path_from_utf8(path).lexically_normal());
     while (path.size() > 1 && path.back() == '/')
         path.pop_back();
     return path;
@@ -46,7 +48,7 @@ std::string project_source(std::string raw, const std::filesystem::path& project
     if (raw.starts_with("lua: "))
         raw.erase(0, 5);
     std::replace(raw.begin(), raw.end(), '\\', '/');
-    for (const auto& component : std::filesystem::path(raw))
+    for (const auto& component : path_from_utf8(raw))
         if (component == "..")
             return {};
     const auto path = normalize_path(std::move(raw));

tests/build_diagnostics_tests.cpp

@@ -1,4 +1,5 @@
 #include <faset/editor/build_diagnostics.hpp>
+#include <faset/core/io.hpp>
 #include <iostream>
 #include <stdexcept>
 
@@ -25,7 +26,7 @@ void contracts() {
               rows[0].at("line") == 6 && rows[0].at("severity") == "error" &&
               rows[0].at("message") == "unexpected symbol near '='",
           "Lua syntax error and ANSI stripping work");
-    const auto windows = fs::path(R"(C:\Café)");
+    const auto windows = path_from_utf8(R"(C:\Café)");
     rows = editor::parse_build_diagnostics(
         R"(C:\Café\Scripts\Game.cpp(17,4): error C2143: syntax error)" "\n"
         R"(C:\Café\Scripts\Game.cpp:19:2: warning: suspicious conversion)" "\n",