perf(memory): eliminate deep copies in range-based for loops and lambdas

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>

src/modules/hyprland/windowcount.cpp

@@ -79,7 +79,7 @@ auto WindowCount::getActiveWorkspace(const std::string& monitorName) -> Workspac
   const auto monitors = m_ipc.getSocket1JsonReply("monitors");
   if (monitors.isArray()) {
     auto monitor = std::ranges::find_if(
-        monitors, [&](Json::Value monitor) { return monitor["name"] == monitorName; });
+        monitors, [&](const Json::Value& monitor) { return monitor["name"] == monitorName; });
     if (monitor == std::end(monitors)) {
       spdlog::warn("Monitor not found: {}", monitorName);
       return Workspace{
@@ -93,7 +93,7 @@ auto WindowCount::getActiveWorkspace(const std::string& monitorName) -> Workspac
     const auto workspaces = m_ipc.getSocket1JsonReply("workspaces");
     if (workspaces.isArray()) {
       auto workspace = std::ranges::find_if(
-          workspaces, [&](Json::Value workspace) { return workspace["id"] == id; });
+          workspaces, [&](const Json::Value& workspace) { return workspace["id"] == id; });
       if (workspace == std::end(workspaces)) {
         spdlog::warn("No workspace with id {}", id);
         return Workspace{