milestone 30: overview as a dashboard, explicit health contract, period aggregations

src/storage/repositories/events_repo.zig

@@ -172,6 +172,24 @@ pub fn resolveActiveByKey(
     return database.changes() != 0;
 }
 
+const resolve_by_code_sql =
+    \\UPDATE operational_events SET resolved_at = ?2
+    \\ WHERE code = ?1 AND resolved_at IS NULL
+;
+
+/// Closes every open episode of `code`, and returns how many. The store uses it
+/// once at init for a code no emitter writes any more: an episode whose producer
+/// no longer exists can never demonstrate recovery, so nothing but this would
+/// ever close it.
+pub fn resolveActiveByCode(database: *db.Db, now_s: i64, code: []const u8) db.Error!i64 {
+    var stmt = try database.prepare(resolve_by_code_sql);
+    defer stmt.deinit();
+    try stmt.bindText(1, code);
+    try stmt.bindInt(2, now_s);
+    try stmt.exec();
+    return database.changes();
+}
+
 const select_active_id_sql =
     "SELECT id FROM operational_events WHERE code = ?1 AND subject_key = ?2 AND resolved_at IS NULL";