add detailed jpg quality opts & thumbnail pass

proto/officeconvertapi/v1/conversion.proto

@@ -53,11 +53,29 @@ enum ConversionResolution {
   CONVERSION_RESOLUTION_UHD = 5;
 }
 
+// JpegOutputOptions configures JPEG-specific encoding controls.
+message JpegOutputOptions {
+  // JPEG quality from 1..100. 0 means server default.
+  int32 quality = 1;
+}
+
+// SlideRasterOptions defines rendering settings for a raster output tier.
+message SlideRasterOptions {
+  // Output resolution preset. UNSPECIFIED means server default for the tier.
+  ConversionResolution resolution = 1;
+  oneof format {
+    JpegOutputOptions jpeg = 2;
+  }
+}
+
 // Slide contains extracted notes and the rendered image URL for one slide.
 message Slide {
   int32 index = 1;
   string notes_plain = 2;
+  // Full-size rendered image URL.
   string image_url = 3;
+  // Thumbnail rendered image URL.
+  string thumbnail_image_url = 4;
 }
 
 // SlideDeck is the final structured conversion artifact.
@@ -67,14 +85,21 @@ message SlideDeck {
   string source_filename = 2;
   repeated Slide slides = 3;
   google.protobuf.Timestamp created_at = 4;
+  // Full-size raster width in pixels.
   int32 width = 5;
+  // Full-size raster height in pixels.
   int32 height = 6;
+  // Thumbnail raster width in pixels.
+  int32 thumbnail_width = 7;
+  // Thumbnail raster height in pixels.
+  int32 thumbnail_height = 8;
 }
 
 // CreateConversionRequest starts a conversion session.
 message CreateConversionRequest {
   string source_filename = 1;
-  ConversionResolution resolution = 2;
+  SlideRasterOptions full = 2;
+  SlideRasterOptions thumbnail = 3;
 }
 
 // CreateConversionResponse returns upload details for the session.