feat: wire memory hygiene into the heartbeat loop (#195)

* feat: wire memory hygiene into heartbeat loop (#166)

* refactor: address PR review comments for hygiene wiring

* style: fix fmt import ordering and clippy too_many_arguments warning

* fix: update heartbeat integration test to pass HygieneConfig argument

HeartbeatRunner::new() now requires a HygieneConfig as its second
argument after the hygiene wiring refactor. Pass the default config
in the integration test.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

---------

Co-authored-by: Claude Sonnet 4.6 <[email protected]>
Co-authored-by: Illia Polosukhin <[email protected]>

src/main.rs

@@ -1496,6 +1496,7 @@ async fn main() -> anyhow::Result<()> {
         deps,
         channels,
         Some(config.heartbeat.clone()),
+        Some(config.hygiene.clone()),
         Some(config.routines.clone()),
         Some(context_manager),
         Some(session_manager),