perf: implement findings #2, #3, #17 from architecture audit

- Finding #2: Replace Mutex<HashMap> with moka::sync::Cache in file_blob_read_repository (10K cap, 30s TTI)
- Finding #3: Add chunked upload persistence with session.json + progress.bin bitmask for crash recovery
- Finding #17: Remove manual gzip compression, delegate entirely to tower-http CompressionLayer
- Remove dead code: StubCompressionPort, GzipCompressionService re-export, duplicate response structs
- All 114 tests passing

src/common/di.rs

@@ -7,7 +7,7 @@ use crate::application::services::auth_application_service::AuthApplicationServi
 
 use crate::application::ports::cache_ports::ContentCachePort;
 use crate::application::ports::chunked_upload_ports::ChunkedUploadPort;
-use crate::application::ports::compression_ports::CompressionPort;
+
 use crate::application::ports::dedup_ports::DedupPort;
 use crate::application::ports::favorites_ports::FavoritesUseCase;
 use crate::application::ports::file_ports::{
@@ -46,7 +46,7 @@ use crate::infrastructure::services::path_service::PathService;
 use crate::infrastructure::services::trash_cleanup_service::TrashCleanupService;
 
 use crate::common::stubs::{
-    StubCompressionPort, StubDedupPort, StubFileManagementUseCase, StubFileReadPort,
+    StubDedupPort, StubFileManagementUseCase, StubFileReadPort,
     StubFileRetrievalUseCase, StubFileUploadUseCase, StubFileUseCaseFactory, StubFileWritePort,
     StubFolderStoragePort, StubFolderUseCase, StubI18nService, StubSearchUseCase, StubZipPort,
 };
@@ -124,7 +124,8 @@ impl AppServiceFactory {
         let chunked_upload_service = Arc::new(
             crate::infrastructure::services::chunked_upload_service::ChunkedUploadService::new(
                 chunked_temp_dir,
-            ),
+            )
+            .await,
         );
 
         // Image transcoding service for automatic WebP conversion
@@ -146,13 +147,8 @@ impl AppServiceFactory {
         );
         dedup_service.initialize().await?;
 
-        // Compression service (gzip)
-        let compression_service: Arc<dyn CompressionPort> = Arc::new(
-            crate::infrastructure::services::compression_service::GzipCompressionService::new(),
-        );
-
         tracing::info!(
-            "Core services initialized: path service, file content cache, thumbnails, chunked upload, image transcode, dedup (PRIMARY blob storage), compression"
+            "Core services initialized: path service, file content cache, thumbnails, chunked upload, image transcode, dedup (PRIMARY blob storage)"
         );
 
         Ok(CoreServices {
@@ -162,7 +158,6 @@ impl AppServiceFactory {
             chunked_upload_service,
             image_transcode_service,
             dedup_service,
-            compression_service,
             zip_service: Arc::new(StubZipPort), // Placeholder - replaced after app services init
             config: self.config.clone(),
         })
@@ -688,7 +683,6 @@ pub struct CoreServices {
     pub chunked_upload_service: Arc<dyn ChunkedUploadPort>,
     pub image_transcode_service: Arc<dyn ImageTranscodePort>,
     pub dedup_service: Arc<dyn DedupPort>,
-    pub compression_service: Arc<dyn CompressionPort>,
     pub zip_service: Arc<dyn ZipPort>,
     pub config: AppConfig,
 }
@@ -800,7 +794,7 @@ impl Default for AppState {
 
         // Create dummy chunked upload service
         let dummy_chunked_upload_service: Arc<dyn ChunkedUploadPort> = Arc::new(
-            crate::infrastructure::services::chunked_upload_service::ChunkedUploadService::new(
+            crate::infrastructure::services::chunked_upload_service::ChunkedUploadService::new_stub(
                 std::path::PathBuf::from("./storage/.uploads"),
             ),
         );
@@ -825,7 +819,6 @@ impl Default for AppState {
             chunked_upload_service: dummy_chunked_upload_service,
             image_transcode_service: dummy_image_transcode_service,
             dedup_service: dummy_dedup_service,
-            compression_service: Arc::new(StubCompressionPort) as Arc<dyn CompressionPort>,
             zip_service: Arc::new(StubZipPort) as Arc<dyn ZipPort>,
             config: config.clone(),
         };

src/common/stubs.rs

@@ -22,7 +22,6 @@ use crate::application::dtos::pagination::{PaginatedResponseDto, PaginationReque
 use crate::application::dtos::search_dto::{
     SearchCriteriaDto, SearchResultsDto, SearchSuggestionsDto,
 };
-use crate::application::ports::compression_ports::{CompressionLevel, CompressionPort};
 use crate::application::ports::file_ports::{
     FileManagementUseCase, FileRetrievalUseCase, FileUploadUseCase, FileUseCaseFactory,
     OptimizedFileContent,
@@ -59,31 +58,6 @@ impl ZipPort for StubZipPort {
     }
 }
 
-// ---------------------------------------------------------------------------
-// CompressionPort
-// ---------------------------------------------------------------------------
-
-pub struct StubCompressionPort;
-
-#[async_trait]
-impl CompressionPort for StubCompressionPort {
-    async fn compress_data(
-        &self,
-        _data: &[u8],
-        _level: CompressionLevel,
-    ) -> Result<Vec<u8>, DomainError> {
-        Ok(Vec::new())
-    }
-
-    async fn decompress_data(&self, _compressed_data: &[u8]) -> Result<Vec<u8>, DomainError> {
-        Ok(Vec::new())
-    }
-
-    fn should_compress(&self, _mime_type: &str, _size: u64) -> bool {
-        false
-    }
-}
-
 // ---------------------------------------------------------------------------
 // FileReadPort
 // ---------------------------------------------------------------------------