refactor: replace get_stream_url with get_source_uri per ADR-0002

Providers now expose a source URI (for FFmpeg) instead of a
viewer-facing stream URL. Playout Service will own transcoding.

- Add SourceUri value object (NetworkUrl | FilePath)
- Remove StreamQuality, StreamingProtocol from domain
- Simplify ProviderCapabilities (drop streaming_protocol, transcode)
- Jellyfin: return static direct stream URL
- Local files: return absolute file path
- Rename use case get_stream_url -> get_source
- Stream endpoint returns JSON SourceUri instead of 307 redirect

crates/domain/src/ports/media.rs

@@ -3,20 +3,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::errors::{DomainError, DomainResult};
 use crate::models::MediaItem;
-use crate::value_objects::{ContentType, MediaFilter, MediaItemId};
-
-#[derive(Debug, Clone)]
-pub enum StreamQuality {
-    Direct,
-    Transcode(u32),
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "snake_case")]
-pub enum StreamingProtocol {
-    Hls,
-    DirectFile,
-}
+use crate::value_objects::{ContentType, MediaFilter, MediaItemId, SourceUri};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ProviderCapabilities {
@@ -26,9 +13,7 @@ pub struct ProviderCapabilities {
     pub tags: bool,
     pub decade: bool,
     pub search: bool,
-    pub streaming_protocol: StreamingProtocol,
     pub rescan: bool,
-    pub transcode: bool,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -55,11 +40,7 @@ pub trait IMediaProvider: Send + Sync {
 
     async fn fetch_by_id(&self, item_id: &MediaItemId) -> DomainResult<Option<MediaItem>>;
 
-    async fn get_stream_url(
-        &self,
-        item_id: &MediaItemId,
-        quality: &StreamQuality,
-    ) -> DomainResult<String>;
+    async fn get_source_uri(&self, item_id: &MediaItemId) -> DomainResult<SourceUri>;
 
     async fn list_collections(&self) -> DomainResult<Vec<Collection>> {
         Err(DomainError::InfrastructureError(
@@ -95,11 +76,7 @@ pub trait IProviderRegistry: Send + Sync {
 
     async fn fetch_by_id(&self, item_id: &MediaItemId) -> DomainResult<Option<MediaItem>>;
 
-    async fn get_stream_url(
-        &self,
-        item_id: &MediaItemId,
-        quality: &StreamQuality,
-    ) -> DomainResult<String>;
+    async fn get_source_uri(&self, item_id: &MediaItemId) -> DomainResult<SourceUri>;
 
     fn provider_ids(&self) -> Vec<String>;
 

crates/domain/src/ports/mod.rs

@@ -17,7 +17,6 @@ pub use events::{DomainEvent, EventConsumer, EventEnvelope, EventHandler, EventP
 pub use library::{LibraryCommand, LibraryQuery, LibrarySyncAdapter};
 pub use media::{
     Collection, IMediaProvider, IProviderRegistry, ProviderCapabilities, SeriesSummary,
-    StreamQuality, StreamingProtocol,
 };
 pub use provider_config::{ProviderConfigCommand, ProviderConfigQuery};
 pub use schedule::{ScheduleCommand, ScheduleQuery};