Unified Task Manager View for All Scheduled Job Types

The Task Manager page in System Management currently only displays scheduled Discovery and Benchmark jobs, and this view cannot be sorted by last run time. Scheduled QApp, DVT/Parser, and Plugin jobs are not visible in this same interface, making it difficult for administrators to get a complete picture of all scheduled activity. This enhancement proposes expanding the Task Manager to list all scheduled job types, including QApp, DVT/Parser, Plugin, Benchmark, and Discovery, in a single consolidated table. The table should support sorting by last run time and allow administrators to pause individual jobs. This would give administrators a centralized way to review and manage scheduled workloads, which is particularly valuable when planning system upgrades or maintenance windows that require pausing scheduled activity in advance.