feat: add perfSONAR-diagnostic-report.sh v1.0.0

Read-only diagnostic collection script for remote troubleshooting.
Runs 12 diagnostic sections and writes a self-contained report file
to /tmp/perfsonar-diag-<hostname>-<date>.txt.

Supports both container (Podman) and RPM toolkit deployments with
auto-detection. Includes targeted checks for all previously-fixed
bugs (cpufreq panic, certbot :Z mount, D-Bus SELinux boolean,
stale service file mounts, container Initialized state).

Also:
- install_tools_scripts.sh v1.0.5: bootstrap downloads the new script
- install-perfsonar-testpoint.md: troubleshooting section updated to
  reference the diagnostic report script
- CHANGELOG.md: [1.5.5] entry added

Author: root

CHANGELOG.md

@@ -5,6 +5,13 @@
 
 All notable changes to this repository will be documented in this file.
 
+## [1.5.5] - 2026-02-26
+
+### Added
+
+- **`perfSONAR-diagnostic-report.sh` v1.0.0**: New read-only diagnostic collection script for remote troubleshooting. Runs 12 diagnostic sections (Host Environment, Network, SELinux, Container Runtime, Configuration Files, Toolkit, Endpoint Connectivity, TLS/Certificates, Systemd Units, Network Tuning, Known Issues, Quick Health Summary) and writes a self-contained report file to `/tmp/perfsonar-diag-<hostname>-<date>.txt`. Supports both container (Podman) and RPM toolkit deployments with auto-detection. Includes targeted checks for all previously-fixed bugs (cpufreq panic, certbot `:Z` mount, D-Bus SELinux boolean, stale service file mounts, container Initialized state). CLI flags: `--base DIR`, `--type TYPE`, `--output FILE`, `--no-color`, `--brief`, `--version`, `--help`.
+- **`install_tools_scripts.sh` v1.0.5**: Bootstrap now also downloads `perfSONAR-diagnostic-report.sh`.
+
 ## [1.5.4] - 2026-02-26
 
 ### Fixed

docs/perfsonar/tools_scripts/install_tools_scripts.sh

@@ -5,6 +5,8 @@ set -euo pipefail
 # Purpose: Ensure the perfSONAR testpoint repository is cloned and the tools_scripts
 #          directory is present under /opt/perfsonar-tp/tools_scripts.
 #
+# Version: 1.0.5 - 2026-02-26
+#   - Add perfSONAR-diagnostic-report.sh to download list.
 # Version: 1.0.4 - 2026-02-26
 #   - Add perfSONAR-health-monitor.sh to download list.
 # Version: 1.0.3 - 2026-02-26
@@ -14,7 +16,7 @@ set -euo pipefail
 # Author: Shawn McKee, University of Michigan
 # Acknowledgements: Supported by IRIS-HEP and OSG-LHC
 
-VERSION="1.0.4"
+VERSION="1.0.5"
 PROG_NAME="$(basename "$0")"
 
 # Check for --version or --help flags
@@ -91,6 +93,7 @@ files=(
     perfSONAR-auto-enroll-psconfig.sh
     perfSONAR-auto-update.sh
     perfSONAR-health-monitor.sh
+    perfSONAR-diagnostic-report.sh
     seed_testpoint_host_dirs.sh
     update-perfsonar-deployment.sh
     perfSONAR-orchestrator.sh