JsonProcessor.h is not self-contained (missing includes / forward declarations)

[bobsira]

Problem

\JsonProcessor.h\ relies on the precompiled header (\pch.h) to provide
lohmann::json, \AttributesMap, \LoggerSettings, \LogSource, and several STL types. Any translation unit that includes it without the PCH will fail to compile.

This makes the header fragile and increases coupling.

Expected behavior

\JsonProcessor.h\ should compile standalone. Include the minimal required headers (or add forward declarations where possible) so that it is self-contained.

Types currently missing from the header:

Symbol	Source
\
lohmann::json\	<nlohmann/json.hpp>\ or forward-declare \
lohmann::json\
\AttributesMap\	\Utility.h\
\LoggerSettings\	\Parser/LoggerSettings.h\
\LogSource\	\Parser/LoggerSettings.h\
\std::shared_ptr\	<memory>\
\std::vector\	<vector>\ (already included)
\std::string\	<string>\ (already included)

Context

Raised during Copilot code review on PR #222.