feat(safety): implement report content API

crates/quark/src/impl/mongo/safety/report.rs

@@ -0,0 +1,13 @@
+use crate::models::Report;
+use crate::{AbstractReport, Result};
+
+use super::super::MongoDb;
+
+static COL: &str = "safety_reports";
+
+#[async_trait]
+impl AbstractReport for MongoDb {
+    async fn insert_report(&self, report: &Report) -> Result<()> {
+        self.insert_one(COL, report).await.map(|_| ())
+    }
+}