fix(security): prevent DoS by bounding pagination limit in getTasks

[Abhishek2005-ard]

Overview

This PR resolves an Application Denial of Service (DoS) vulnerability in the getTasks endpoint. Previously, the limit query parameter was unbounded, allowing an attacker to request an excessively large number of tasks (e.g., ?limit=1000000). This could exhaust server memory and database resources.

Changes Made

• Introduced a MAX_TASK_LIMIT constant set to 100.
• Wrapped the pagination limit parsed from the query parameter in Math.min(..., MAX_TASK_LIMIT) to strictly enforce the upper boundary while still maintaining the existing MIN_TASK_LIMIT.

Testing Performed

• Verified that requesting ?limit=500 accurately caps the returned records to 100 and no longer attempts an unbounded query.
• Confirmed that standard limits (e.g., ?limit=10) continue to operate as expected.

close #1567