feat: align build system and add root path security restriction

Align system-monitor-server with fast-time-server reference implementation
and add chroot-like root directory restriction for enhanced security.

Build System Improvements:
- Restructure Makefile following fast-time-server conventions
- Add dynamic help system with emoji section headers
- Add version injection via LDFLAGS
- Add multiple run modes (stdio, http, sse, dual, rest)
- Add MCP tool testing targets (test-metrics, test-processes, test-health)
- Add comprehensive quality checks (fmt, vet, lint, staticcheck, security)
- Add benchmarking and performance testing targets
- Update .gitignore to include dist/ and coverage/ directories
- Add staticcheck.conf for static analysis configuration

Security Enhancements:
- Add root_path configuration for chroot-like file access restriction
- Enforce root boundary BEFORE allowed_paths checks (defense in depth)
- Root restriction prevents access outside configured directory tree
- Backward compatible: empty root_path maintains existing behavior
- Add comprehensive tests for root path validation

Documentation:
- Rewrite README.md following fast-time-server style
- Add Root Directory Restriction security section
- Update configuration examples with root_path
- Improve Quick Start and Development sections
- Add cross-compilation instructions
- Document all security features comprehensively

Configuration:
- Add security.root_path setting to config.yaml
- Document production recommendation for root restriction
- Update security comments for clarity

Testing:
- Add TestLogMonitorRootPathRestriction with comprehensive coverage
- Update all NewLogMonitor calls to include root_path parameter
- All tests passing (4 packages, 50+ tests)

Signed-off-by: Mihai Criveti <[email protected]>
Signed-off-by: Mihai Criveti <[email protected]>

Author: crivetimihai

mcp-servers/go/system-monitor-server/.gitignore

@@ -14,6 +14,9 @@
 # Go build artifacts
 system-monitor-server
 *.bin
+dist/
+coverage/
+coverage.html
 
 # Dependency directories
 vendor/