nla_parse() stack overflow fixes

[abeltrano]

Type

• Bug fix
• Feature addition
• Feature update
• Documentation
• Build Infrastructure

Side Effects

• Breaking change
• Non-functional change

Goals

• Ensure no stack overflows occur.

Technical Details

• Some uses of nla_parse were not updated when originally fixed in Fix some memory access issues #221. Fix those off-by-1 instances here.
• Add missing --id option for netremote-cli command ap-enable.

Test Results

• Ran netremote-server locally and then netremote-cli wifi enumaps and verified an ASAN-induced crash no longer occurs.

Reviewer Focus

• None

Future Work

• None

Checklist

• Build target all compiles cleanly.
• clang-format and clang-tidy deltas produced no new output.
• Newly added functions include doxygen-style comment block.