Ensure blobs can be deleted following image manifest deletion.

Ensure that the deleted manifest is deleted properly, and hence can be
garbage collected.

Author: bglimepoint

.sqlx/query-145b8d36bfdffcc8ee8891ce09c85e66ff63ff613ef2bfb729f29c6cf43bad80.json

@@ -301,7 +301,7 @@ async fn delete_image_manifest(
         let digest = Digest::try_from_raw(&reference)?;
         let digest_str = digest.as_str();
         let res = sqlx::query!(
-            "DELETE FROM repo_blob_assoc WHERE repo_name = $1 AND blob_digest = $2",
+            "DELETE FROM repo_blob_assoc WHERE repo_name = $1 AND manifest_digest = $2",
             repo,
             digest_str
         )
@@ -320,6 +320,10 @@ async fn delete_image_manifest(
                 sqlx::query!("DELETE FROM manifest where digest = $1", digest_str)
                     .execute(&state.db_rw)
                     .await?;
+
+                sqlx::query!("DELETE FROM manifest_blob_assoc where manifest_digest = $1", digest_str)
+                    .execute(&state.db_rw)
+                    .await?;
             }
         }
     }