fix: include R2 key in error message (#2326)

Include the R2 key in the error message for better visibility when
debugging.

We're getting rate limits for put with the same key...

packages/api/src/utils/uploader/r2-uploader.js

@@ -54,7 +54,7 @@ export class R2Uploader {
       return { key, url }
     } catch (cause) {
       // @ts-expect-error wen ts understand Error object?
-      throw new Error('Failed to upload CAR to R2', { cause })
+      throw new Error(`Failed to upload CAR to R2: ${key}`, { cause })
     }
   }
 
@@ -74,7 +74,7 @@ export class R2Uploader {
       })
     } catch (cause) {
       // @ts-expect-error error.cause is legit.
-      throw new Error('Failed to write satnav index to R2', { cause })
+      throw new Error(`Failed to write satnav index to R2: ${key}`, { cause })
     }
   }
 
@@ -91,7 +91,9 @@ export class R2Uploader {
       })
     } catch (cause) {
       // @ts-expect-error error.cause is legit.
-      throw new Error('Failed to write dudewhere index to R2', { cause })
+      throw new Error(`Failed to write dudewhere index to R2: ${key}`, {
+        cause,
+      })
     }
   }
 }