fix: leftover Want marshalling atoll on long params

[tonycoder-hub]

Summary

• Want::GetLongParam / ArrayAddData parsed marshalled IPC string params with a digit-ish regex plus std::atoll. Overflow, empty, and trailing junk still converted (regex is not an overflow check), so Want extras can wrap/clamp into the wrong long.
• Parse with std::from_chars (optional +, overflow-checked; keep previous in-range decimal/n.frac behavior). On failure log with ABILITYBASE_LOGE and return the default / skip the element.

Test plan

• Host g++ -std=c++17 -fsanitize=address,undefined: valid 0/123/+123/-123/123.45/LLONG_MAX match atoll; reject empty, overflow, trailing junk, hex, and non-digits.
• Existing Want GetLongParam marshalling tests still hold for in-range integer strings.