Background

We need a full broker-side audit to ensure every ACK/ReasonCode path returns the correct code for the actual runtime scenario.

Goal

Create one parent tracking task for protocol reason-code completeness, and execute focused audits in child tasks.

Scope

• Verify scenario -> reason-code mapping is correct (not only enum completeness)
• For incorrect mappings: fix broker logic and return code behavior
• Add/adjust tests for each corrected path

Target Protocol Areas

• CONNECT/CONNACK
• DISCONNECT
• PUBACK/PUBREC/PUBREL/PUBCOMP
• SUBACK
• UNSUBACK

Child Tasks

• Connector path audit and fixes
• Publish path audit and fixes
• Subscribe/Unsubscribe path audit and fixes

Done Criteria

• All identified mismatches are fixed
• Tests cover corrected mappings
• Parent task links all child tasks and tracks completion