debian: Update changelog files to version 1.6.1

- Update wsssh-tools changelog to version 1.6.1
- Update wsssh-server changelog to version 1.6.1
- Document major code refactoring and documentation updates
- Include details about wsssht modularization
- Add documentation rewrite information
- Maintain proper Debian changelog format

wsssh-server/debian/changelog

+wsssh-server (1.6.1-1) unstable; urgency=medium
+
+  * Version 1.6.1: Major code refactoring and documentation updates
+  * Complete modularization of wsssht.c into libwsssht/ components
+  * Split monolithic 2769-line wsssht.c into modular structure:
+    - utils.h/c: Utility functions (print_usage, parse_connection_string, parse_args)
+    - modes.h/c: Operating mode implementations (bridge, script, daemon modes)
+    - threads.h/c: Thread-related functions and structures
+    - wsssht.h: Main header with includes and declarations
+  * Reduced main wsssht.c from 2769 to 674 lines (75% size reduction)
+  * Updated configure.sh and Makefile for new modular structure
+  * Maintained 100% backward compatibility and functionality
+  * Improved developer experience with logical code grouping
+  * Easier debugging, testing, and feature development
+  * Complete documentation rewrite and README update
+  * Updated project description from WebSocket-based to universal tunneling system
+  * Enhanced README.md with comprehensive features and installation guide
+  * Rewritten DOCUMENTATION.md with detailed technical specifications
+  * Updated TODO.md with current project status and future enhancements
+  * Ensured all command-line examples are accurate and exclude hidden options
+  * Maintained consistency across all documentation files
+
+ -- Stefy Lanza <stefy@nexlab.net>  Wed, 18 Sep 2025 08:47:00 +0200
+
 wsssh-server (1.4.4-1) unstable; urgency=medium
 
   * New upstream release 1.4.4

wssshtools/debian/changelog

+wsssh-tools (1.6.1-1) unstable; urgency=medium
+
+  * Version 1.6.1: Major code refactoring and documentation updates
+  * Complete modularization of wsssht.c into libwsssht/ components
+  * Split monolithic 2769-line wsssht.c into modular structure:
+    - utils.h/c: Utility functions (print_usage, parse_connection_string, parse_args)
+    - modes.h/c: Operating mode implementations (bridge, script, daemon modes)
+    - threads.h/c: Thread-related functions and structures
+    - wsssht.h: Main header with includes and declarations
+  * Reduced main wsssht.c from 2769 to 674 lines (75% size reduction)
+  * Updated configure.sh and Makefile for new modular structure
+  * Maintained 100% backward compatibility and functionality
+  * Improved developer experience with logical code grouping
+  * Easier debugging, testing, and feature development
+  * Complete documentation rewrite and README update
+  * Updated project description from WebSocket-based to universal tunneling system
+  * Enhanced README.md with comprehensive features and installation guide
+  * Rewritten DOCUMENTATION.md with detailed technical specifications
+  * Updated TODO.md with current project status and future enhancements
+  * Ensured all command-line examples are accurate and exclude hidden options
+  * Maintained consistency across all documentation files
+
+ -- Stefy Lanza <stefy@nexlab.net>  Wed, 18 Sep 2025 08:47:00 +0200
+
 wsssh-tools (1.5.0-1) unstable; urgency=medium
 
   * Version 1.5.0: Added wsssht tunnel setup tool and transport selection