fix(packages/sdk): Fix broken JSR build

Author: CPlusPatch

packages/sdk/jsr.jsonc

@@ -7,7 +7,7 @@
         ".": "./inbox-processor.ts",
         "./http": "./http.ts",
         "./crypto": "./crypto.ts",
-        "./entities": "./entities.ts",
-        "./schemas": "./schemas.ts"
+        "./entities": "./entities/index.ts",
+        "./schemas": "./schemas/index.ts"
     }
 }