[monrog2]

Summary

• explain that bootflash capacity was not evaluated when required firmware metadata is missing
• identify the 32-bit and 64-bit image requirement for ACI 6.0(2)+ targets and improve remediation guidance
• document the distinction between missing image metadata and detected insufficient space
• cover the reported 5.2(6e) to 6.0(9e) missing 64-bit image path

Testing

• Python 3.8 full unit suite: 1464 passed

Closes #483