dev-api: add developer portal, OpenAPI spec, and Flatenbadet case study

- New /developers/ page with API docs, SDKs, pricing, use cases
- OpenAPI 3.0 spec for Orders, Missions, Photos, Analytics
- Case study: Glasskiosken i Flatenbadet — complete ROI analysis
- Updated /order/ with recurring missions and frequency dropdown

services/frilans-payout/node_modules/pino/lib/constants.js

@@ -0,0 +1,28 @@
+/**
+ * Represents default log level values
+ *
+ * @enum {number}
+ */
+const DEFAULT_LEVELS = {
+  trace: 10,
+  debug: 20,
+  info: 30,
+  warn: 40,
+  error: 50,
+  fatal: 60
+}
+
+/**
+ * Represents sort order direction: `ascending` or `descending`
+ *
+ * @enum {string}
+ */
+const SORTING_ORDER = {
+  ASC: 'ASC',
+  DESC: 'DESC'
+}
+
+module.exports = {
+  DEFAULT_LEVELS,
+  SORTING_ORDER
+}