Move list_photos to files module

Added some tests, refactored the error handling/logging, and refactored
the extension tests.

src/data/mod.rs

@@ -1,5 +1,7 @@
 use std::{fs, str::FromStr};
 
+use anyhow::{anyhow, Context};
+
 use chrono::{DateTime, Utc};
 use log::error;
 
@@ -78,10 +80,10 @@ impl FromRequest for Claims {
     }
 }
 
-#[derive(Serialize)]
-pub struct PhotosResponse<'a> {
-    pub photos: &'a [String],
-    pub dirs: &'a [String],
+#[derive(Serialize, Deserialize, Debug)]
+pub struct PhotosResponse {
+    pub photos: Vec<String>,
+    pub dirs: Vec<String>,
 }
 
 #[derive(Deserialize)]