chore: resolve IDE code quality warnings and errors

[Vladush]

Description

Resolves numerous IDE warnings and errors across the codebase. Key improvements include:

• Stream formatting optimizations (std::endl to \n)
• Removed unused headers and optimized variable types (e.g. const cv::ocl::Device &dev)
• Replaced dangerous empty catch(...) blocks with parse_int helpers for config parsing
• Fixed C-style POSIX socket casting using reinterpret_cast
• Added .markdownlintignore to suppress false positive markdown linting in debian/changelog
• Added --no-install-recommends and apt-get clean to Dockerfile.riscv64 to prevent QEMU segmentation faults during CI builds.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (code quality and IDE compliance)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• Compiled project completely using CMake/Ninja with no new warnings
• Executed local test suite (./linuxcampam_tests) with 71 passing tests and 0 failures

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes