Replace getStorageForRequest with s.storage (bd-32)

- Replaced all getStorageForRequest(req) calls with direct s.storage access
- Updated 5 handler files: server_issues_epics.go (~8 calls), server_labels_deps_comments.go (~4 calls), server_compact.go (~2 calls), server_export_import_auto.go (~2 calls), server_routing_validation_diagnostics.go (~1 call)
- Only remaining references are in server_cache_storage.go (to be deleted in bd-33) and server_eviction_test.go (to be deleted in bd-34)
- Part of bd-29 epic to remove daemon storage cache

Amp-Thread-ID: https://ampcode.com/threads/T-239a5531-68a5-4c98-b85d-0e3512b2553c
Co-authored-by: Amp <amp@ampcode.com>

internal/rpc/server_export_import_auto.go

@@ -25,13 +25,7 @@ func (s *Server) handleExport(req *Request) Response {
 		}
 	}
 
-	store, err := s.getStorageForRequest(req)
-	if err != nil {
-		return Response{
-			Success: false,
-			Error:   fmt.Sprintf("failed to get storage: %v", err),
-		}
-	}
+	store := s.storage
 
 	ctx := s.reqCtx(req)
 
@@ -171,10 +165,7 @@ func (s *Server) handleImport(req *Request) Response {
 // This fixes bd-132: daemon shows stale data after git pull
 func (s *Server) checkAndAutoImportIfStale(req *Request) error {
 	// Get storage for this request
-	store, err := s.getStorageForRequest(req)
-	if err != nil {
-		return fmt.Errorf("failed to get storage: %w", err)
-	}
+	store := s.storage
 
 	ctx := s.reqCtx(req)