feat: Update dependencies and implement face detection features

- Updated async-nats dependency to version 0.45.0 in both libertas_api and libertas_worker.
- Introduced AI-related structures and traits in libertas_core for face detection.
- Added AiConfig and FaceDetectorRuntime enums to support different face detection methods.
- Implemented TractFaceDetector and RemoteNatsFaceDetector in libertas_infra for local and remote face detection.
- Created FaceDetectionPlugin to integrate face detection into the media processing pipeline.
- Enhanced XMP writing functionality to include face region data.
- Updated PluginManager to initialize face detection plugins based on configuration.

libertas_core/src/ai.rs

@@ -0,0 +1,17 @@
+use async_trait::async_trait;
+use serde::{Deserialize, Serialize};
+
+use crate::error::CoreResult;
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct BoundingBox {
+    pub x_min: f32,
+    pub y_min: f32,
+    pub x_max: f32,
+    pub y_max: f32,
+}
+
+#[async_trait]
+pub trait FaceDetector: Send + Sync {
+    async fn detect_faces(&self, image_bytes: &[u8]) -> CoreResult<Vec<BoundingBox>>;
+}

libertas_core/src/config.rs

@@ -31,6 +31,20 @@ pub struct ThumbnailConfig {
     pub library_path: String,
 }
 
+#[derive(Deserialize, Clone, Debug)]
+#[serde(rename_all = "lowercase")]
+pub enum FaceDetectorRuntime {
+    Tract,
+    Onnx,
+    RemoteNats { subject: String },
+}
+
+#[derive(Deserialize, Clone, Debug)]
+pub struct AiConfig {
+    pub face_detector_runtime: FaceDetectorRuntime,
+    pub face_detector_model_path: Option<String>,
+}
+
 #[derive(Deserialize, Clone, Debug)]
 pub struct Config {
     pub database_url: String,
@@ -50,6 +64,7 @@ pub struct Config {
     pub allowed_sort_columns: Vec<String>,
 
     pub thumbnail_config: Option<ThumbnailConfig>,
+    pub ai_config: Option<AiConfig>,
 }
 
 fn default_max_upload_size() -> u32 {
@@ -73,6 +88,7 @@ pub struct AppConfig {
     pub default_storage_quota_gb: Option<u64>,
     pub allowed_sort_columns: Option<Vec<String>>,
     pub thumbnail_config: Option<ThumbnailConfig>,
+    pub ai_config: Option<AiConfig>,
 }
 
 pub fn load_config() -> CoreResult<AppConfig> {
@@ -108,5 +124,6 @@ pub fn load_config() -> CoreResult<AppConfig> {
         default_storage_quota_gb: Some(config.default_storage_quota_gb),
         allowed_sort_columns: Some(config.allowed_sort_columns),
         thumbnail_config: config.thumbnail_config,
+        ai_config: config.ai_config,
     })
 }

libertas_core/src/lib.rs

@@ -1,9 +1,10 @@
+pub mod ai;
 pub mod authz;
 pub mod config;
 pub mod error;
+pub mod media_utils;
 pub mod models;
 pub mod plugins;
 pub mod repositories;
 pub mod schema;
 pub mod services;
-pub mod media_utils;