Create metadata directory structure

metadata/README.md

@@ -1,2 +1,28 @@
-# This directory will contain lanternfly photos
-# Uploaded automatically when users verify lanternfly sightings
+# Metadata Directory
+
+This directory contains JSON metadata files for each lanternfly sighting.
+
+## File Naming Convention
+- Format: `lanternfly_{username}_{timestamp}.json`
+- Example: `lanternfly_john_2024-01-15T10-30-45-123Z.json`
+
+## Metadata Fields
+```json
+{
+  "username": "john",
+  "sighting_date": "2024-01-15T10:30:45.123Z",
+  "upload_date": "2024-01-15T10:35:22.456Z",
+  "latitude": "40.7128",
+  "longitude": "-74.0060",
+  "location_name": "Central Park, New York",
+  "confidence_score": "0.95",
+  "verification_status": "human_verified",
+  "dataset_version": "1.0.0",
+  "data_source": "lantern_fly_tracker_app",
+  "image_filename": "lanternfly_john_2024-01-15T10-30-45-123Z.jpg",
+  "image_size_bytes": 2048576
+}
+```
+
+## Automatic Updates
+Metadata files are automatically created and uploaded when images are added to the dataset.