refactor(effect): inline areDepsStable() into depsMatch() call

[nerdalytics]

DUP-011

areDepsStable() (lines 839–847) is a thin wrapper that adds null checks before delegating to depsMatch():

function areDepsStable(newDeps, newReads, prevDeps, prevReads): boolean {
    if (!newDeps || !newReads) return false
    return depsMatch(prevDeps, newDeps, prevReads, newReads)
}

Its only caller, tryRestoreStableDeps (line 856), already performs null checks on all four parameters before calling areDepsStable. The null checks are redundant, making the function a pass-through.

areDepsStable can be removed and its call site replaced with a direct depsMatch() call.