feat: add date_taken field to media model and update related functionalities

libertas_worker/src/plugins/xmp_writer.rs

@@ -7,7 +7,7 @@ use libertas_core::{
     plugins::{MediaProcessorPlugin, PluginContext, PluginData},
 };
 use tokio::fs;
-use xmp_toolkit::XmpMeta;
+use xmp_toolkit::{XmpMeta, XmpValue};
 
 pub struct XmpWriterPlugin;
 
@@ -39,6 +39,18 @@ impl MediaProcessorPlugin for XmpWriterPlugin {
             CoreError::Unknown(format!("Failed to set description property in XMP: {}", e))
         })?;
 
+        if let Some(date_taken) = &fresh_media.date_taken {
+            let date_str = date_taken.to_rfc3339();
+            xmp.set_property(
+                "http://ns.adobe.com/exif/1.0/",
+                "DateTimeOriginal",
+                &XmpValue::from(date_str),
+            )
+            .map_err(|e| {
+                CoreError::Unknown(format!("Failed to set DateTimeOriginal in XMP: {}", e))
+            })?;
+        }
+
         if let Some(_location) = &fresh_media.extracted_location {
             // TODO: Set location properties in XMP
         }