Enable collect garbage in peer manager

[kamilsa]

Referenced issues

None

Description of the Change

We were not starting garbage collection for connections. This PR fixes that.

Possible Drawbacks

None

Checklist Before Opening a PR

Before you open a Pull Request (PR), please make sure you've completed the following steps and confirm by answering 'Yes' to each item:

1. Code is formatted: Have you run your code through clang-format to ensure it adheres to the project's coding standards? Yes
2. Code is documented: Have you added comments and documentation to your code according to the guidelines in the project's contributing guidelines? Yes
3. Self-review: Have you reviewed your own code to ensure it is free of typos, syntax errors, logical errors, and unresolved TODOs or FIXME without linking to an issue? Yes
4. Zombienet Tests: Have you ensured that the zombienet tests are passing? Zombienet is a network simulation and testing tool used in this project. It's important to ensure that these tests pass to maintain the stability and reliability of the project. Yes

[Copilot]

Pull Request Overview

This PR ensures that the peer manager begins its garbage collection process immediately after aligning peers.

• Triggers garbage collection right after the initial align() call
• Adds a comment indicating the start of the periodic collection timer

Comments suppressed due to low confidence (3)

core/network/impl/peer_manager_impl.cpp:228

• The comment implies that a timer is started, but collectGarbage() may perform a single run. Consider updating the comment to accurately describe whether it triggers immediate cleanup or schedules recurring collection.

// Start timer for periodic collecting garbage

core/network/impl/peer_manager_impl.cpp:229

• Add a unit or integration test to verify that invoking collectGarbage() at startup correctly schedules or performs the intended periodic cleanup.

collectGarbage();

core/network/impl/peer_manager_impl.cpp:229

• [nitpick] If collectGarbage() internally schedules a periodic task, ensure its handle is stored or managed so you can cancel or prevent duplicate timers later.

collectGarbage();