revert: undo schema.ts field name changes

The v2 API field names (sha256, url) differ from the generated schema
(sha256_hash, upload_url). Rather than modifying the generated schema,
the next commit switches sf images upload to raw fetch with hardcoded
types so it is not coupled to schema.ts.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sigmachirality

src/schema.ts

@@ -2129,7 +2129,7 @@ export interface components {
      */
     vmorch_CapacityId: string;
     vmorch_CompleteUploadRequest: {
-      sha256: string;
+      sha256_hash: string;
     };
     vmorch_CompleteUploadResponse: {
       /**
@@ -2409,7 +2409,7 @@ export interface components {
       part_id: number;
     };
     vmorch_UploadPartResponse: {
-      url: string;
+      upload_url: string;
       expires_at: components["schemas"]["vmorch_UnixEpoch"];
     };
     /** @description if the script is valid utf8 then the response may be in either string, or byte form and the client must handle both */