[bob sira (bobsira)]

Summary

Fixes #223.

JsonProcessor.h depended on the precompiled header to supply JSON, Windows, STL, and project-type declarations. Including it first in a translation unit therefore failed to compile.

• Include the required Windows/STL headers, the library-provided nlohmann/json_fwd.hpp, and Utility.h for AttributesMap.
• Forward-declare LogSource and the existing _LoggerSettings type instead of pulling in the settings implementation.
• Add the Windows, math, and wide-character headers required by Utility.h itself.
• Include JsonProcessor.h first in the existing parser tests and disable PCH for that source in the Visual Studio project. The CMake test target already compiles without PCH.
• Document this compile-time regression check.

No runtime logic or API signatures change.

Validation

• Before the fix, compiling the existing parser test with JsonProcessor.h first failed with missing declarations; it succeeds after the fix.
• A translation unit containing only #include "JsonProcessor.h" compiles on x64 and x86 with MSVC /Y- /W4 /WX.
• CMake x64 Release builds of LogMonitor and LogMonitorTests pass.
• All 7 selected parser and utility tests pass.
• Native Visual Studio test-source compilation passes for x64 and Win32. Evaluated project metadata and fresh compiler records confirm PCH is disabled for JsonProcessorTests.cpp.

Validation was scoped to the changed headers and their consumers; the full EventMonitor suite was not rerun. Its pre-existing historical-replay crash is tracked separately in #238.