Intune Remediation Script Not Running: A Read-First Exit Code, Context, and HealthScripts.log Triage

Intune Remediations (formerly Proactive Remediations) never fixing anything, stuck Pending, or showing With issues? Read license attestation, assignment, IME check-in, detection exit codes, SYSTEM vs user and 32- vs 64-bit context, HealthScripts.log, and the reporting cycle before you rewrite the script.