Fix is_valid_pk to support progressive caching properly

Changes:
1. pmocache/cache_trait.rs - Fixed is_valid_pk() logic:
   - Accept files WITH completion markers (complete downloads)
   - Accept files WITHOUT markers but recent (< 60s) (downloads in progress)
   - Reject files WITHOUT markers and old (>= 60s) (failed downloads)

   This preserves progressive caching: files are valid as soon as prebuffer
   completes, without waiting for completion marker.

2. pmoupnp/cache_registry.rs - Added compatibility layer:
   - Re-exports get_audio_cache/get_cover_cache from singletons
   - Provides build_audio_url/build_cover_url for pmosource
   - Uses PMO_SERVER_URL env var for base URL

3. pmoupnp/lib.rs - Added cache_registry module to public API

This fixes "Cache entry not found" errors while maintaining progressive
caching functionality for play_and_cache example.

pmoupnp/src/cache_registry.rs

@@ -0,0 +1,97 @@
+//! Registre centralisé des caches pour le serveur UPnP (couche de compatibilité)
+//!
+//! Ce module fournit une couche de compatibilité pour pmosource qui utilise
+//! les singletons de pmoaudiocache et pmocovers pour accéder aux caches.
+
+use pmoaudiocache::Cache as AudioCache;
+use pmocache::FileCache;
+use pmocovers::Cache as CoverCache;
+use std::sync::Arc;
+
+/// Accès global au cache de couvertures
+///
+/// # Examples
+///
+/// ```rust,ignore
+/// use pmoupnp::cache_registry::get_cover_cache;
+///
+/// if let Some(cache) = get_cover_cache() {
+///     let pk = cache.add_from_url("http://example.com/cover.jpg").await?;
+/// }
+/// ```
+pub fn get_cover_cache() -> Option<Arc<CoverCache>> {
+    pmocovers::get_cover_cache()
+}
+
+/// Accès global au cache audio
+///
+/// # Examples
+///
+/// ```rust,ignore
+/// use pmoupnp::cache_registry::get_audio_cache;
+///
+/// if let Some(cache) = get_audio_cache() {
+///     let (pk, _) = cache.add_from_url("http://example.com/track.flac", None).await?;
+/// }
+/// ```
+pub fn get_audio_cache() -> Option<Arc<AudioCache>> {
+    pmoaudiocache::get_audio_cache()
+}
+
+/// Construit l'URL complète pour une couverture
+///
+/// # Arguments
+///
+/// * `pk` - Clé primaire de la couverture
+/// * `size` - Taille optionnelle de l'image
+///
+/// # Examples
+///
+/// ```rust,ignore
+/// use pmoupnp::cache_registry::build_cover_url;
+///
+/// let url = build_cover_url("abc123", Some(300))?;
+/// // url = "http://localhost:8080/covers/images/abc123/300"
+/// ```
+pub fn build_cover_url(pk: &str, size: Option<usize>) -> anyhow::Result<String> {
+    // Récupérer l'URL de base depuis la variable d'environnement ou une config
+    let base_url = std::env::var("PMO_SERVER_URL")
+        .unwrap_or_else(|_| "http://localhost:8080".to_string());
+
+    let cache = get_cover_cache()
+        .ok_or_else(|| anyhow::anyhow!("No registered cover cache"))?;
+
+    let param = match size {
+        Some(size_) => Some(size_.to_string()),
+        None => None,
+    };
+    let route = cache.route_for(pk, param.as_deref());
+    Ok(format!("{}{}", base_url, route))
+}
+
+/// Construit l'URL complète pour une piste audio
+///
+/// # Arguments
+///
+/// * `pk` - Clé primaire de la piste
+/// * `param` - Paramètre optionnel (ex: "orig", "stream")
+///
+/// # Examples
+///
+/// ```rust,ignore
+/// use pmoupnp::cache_registry::build_audio_url;
+///
+/// let url = build_audio_url("abc123", Some("stream"))?;
+/// // url = "http://localhost:8080/audio/tracks/abc123/stream"
+/// ```
+pub fn build_audio_url(pk: &str, param: Option<&str>) -> anyhow::Result<String> {
+    // Récupérer l'URL de base depuis la variable d'environnement ou une config
+    let base_url = std::env::var("PMO_SERVER_URL")
+        .unwrap_or_else(|_| "http://localhost:8080".to_string());
+
+    let cache = get_audio_cache()
+        .ok_or_else(|| anyhow::anyhow!("No registered audio cache"))?;
+
+    let route = cache.route_for(pk, param);
+    Ok(format!("{}{}", base_url, route))
+}

pmoupnp/src/lib.rs

@@ -2,6 +2,7 @@ mod object_set;
 mod object_trait;
 
 pub mod actions;
+pub mod cache_registry;
 pub mod devices;
 pub mod services;
 pub mod soap;