Add enterprise features: timeout handling, duration tracking, and health checking

- Add timeout handling to PHP syntax validation
- Add execution duration tracking to smoke_test and validate_all
- Create script_health.sh to validate enterprise standards compliance
- Enhance error messages with better context and actionable guidance
- Add log_duration helper function to common.sh
- Update ENTERPRISE.md and README.md with new features
- All scripts now follow complete enterprise standards

Co-authored-by: jmiller-moko <230051081+jmiller-moko@users.noreply.github.com>

scripts/run/validate_all.sh

@@ -95,6 +95,8 @@ esac
 # Check dependencies
 check_dependencies python3
 
+START_TIME=$(date +%s)
+
 log_info "Start time: $(log_timestamp)"
 
 REQUIRED_CHECKS=(
@@ -204,6 +206,8 @@ log_kv "Optional checks with issues" "${optional_failed}"
 log_separator
 
 log_info "End time: $(log_timestamp)"
+END_TIME=$(date +%s)
+log_info "Duration: $(log_duration "$START_TIME" "$END_TIME")"
 
 if [ "${required_failed}" -gt 0 ]; then
 	log_error "FAILED: ${required_failed} required check(s) failed"