feat(ffi-refactor): replace sequence id with pointer to proposals (8/8)

[demosdemon]

This is the final PR in the series to refactor the FFI layer to be more rust and also a bit more Gooey.

This replaces the serial atomic id for proposals with a pointer to the actual structures. The wrapper that includes the db handle is only necessary in order to do the cached view shenanigans. I will come back to that later.

Depends On: #1228

[github-actions]

Metrics Change Detection ⚠️

This PR contains changes related to metrics:

-        counter!("firewood.ffi.propose_ms").increment(propose_time);
+            counter!("firewood.ffi.commit_ms").increment(commit_time.as_millis());
-        counter!("firewood.ffi.batch_ms").increment(propose_plus_commit_time);
-        counter!("firewood.ffi.commit_ms")
+        counter!("firewood.ffi.batch_ms").increment(start_time.elapsed().as_millis());
+            metrics::counter!("firewood.ffi.commit_ms").increment(commit_time.as_millis());
+            metrics::counter!("firewood.ffi.commit").increment(1);
+        counter!("firewood.ffi.propose_ms").increment(propose_time.as_millis());
+        counter!("firewood.ffi.propose").increment(1);

However, the dashboard was not modified.

You may need to update benchmark/Grafana-dashboard.json accordingly.

---

This check is automated to help maintain the dashboard.

[demosdemon]

I'm gonna move this back to draft and get the coreth change ready first.

[rkuris]

Closes #1272

[demosdemon]

My coreth PR will be merged soon. This is r4r again.