feat: enhance media management with EXIF data extraction, metadata filtering, and storage path generation

refactor: update configuration handling to use environment variables and improve code organization

libertas_core/src/schema.rs

@@ -57,8 +57,9 @@ pub struct SortParams {
 
 #[derive(Debug, Clone, Default)]
 pub struct FilterParams {
-    // In the future, you can add fields like:
-    // pub mime_type: Option<String>,
+    pub mime_type: Option<String>,
+    pub metadata_filters: Option<Vec<MetadataFilter>>,
+    // In the future, we can add fields like:
     // pub date_range: Option<(chrono::DateTime<chrono::Utc>, chrono::DateTime<chrono::Utc>)>,
 }
 
@@ -67,4 +68,10 @@ pub struct ListMediaOptions {
     pub sort: Option<SortParams>,
     pub filter: Option<FilterParams>,
     // pub pagination: Option<PaginationParams>,
+}
+
+#[derive(Debug, Clone)]
+pub struct MetadataFilter {
+    pub tag_name: String,
+    pub tag_value: String,
 }