This commit addresses memory churn caused by implicit deep copies during traversal and allocation of complex structures:
- Replaced pass-by-value 'Json::Value' in std::ranges and range-based for loops with 'const auto&' or 'const Json::Value&' in Hyprland modules, preventing large JSON tree duplications on every update.
- Fixed implicit string and pair copies in UPower and CPU Frequency loops by converting 'auto' to 'const auto&' where possible.
- Added 'std::vector::reserve' calls before 'push_back' loops in MPRIS, Niri, and CFFI modules to prevent exponential vector reallocation during initialization.
Signed-off-by: Austin Horstman <khaneliman12@gmail.com>
Previously, string JSON values were special cased to be provided as
bare strings, which means that CFFI modules have to either know what
type each value is expected to be, or use a heuristic such as trying to
decode and then treating the value as a string on failure.
Instead, we can always return JSON, and let the downstream consumer
handle deserialising the value into whatever type is expected.
The new behaviour is gated on a new ABI version 2: modules built against
version 1 will continue to get the old behaviour.
Austin Horstman