[FEATURE] Configure thread pool scheduler for scheduled tasks

[aniebietafia]

Problem

The application uses @EnableScheduling on the main application class but does not configure a custom task scheduler. By default, Spring uses a single-threaded task scheduler. If one scheduled task blocks or takes a long time to run, it delays the execution of all other scheduled tasks.

Proposed Solution

Create a SchedulingConfig class that registers a ThreadPoolTaskScheduler bean with a configured pool size (e.g. 5–10 threads).

User Stories

• As a maintainer, I want scheduled tasks to run concurrently so that a delay in one task does not block other scheduled processes.

Acceptance Criteria

• Class SchedulingConfig is created.
• A ThreadPoolTaskScheduler is configured.
• Concurrent execution of scheduled tasks is verified.

Tasks

• Implement SchedulingConfig.java.
• Remove @EnableScheduling from the main application class.
• Verify that tasks execute concurrently.