You are working in a small Python service repository. A teammate is writing the
runbook and needs one concrete number from the code.

The HTTP client in this service caps how many times it will retry a failed
upstream request. That cap is a single named constant, `UPLOAD_MAX_ATTEMPTS`.
It is *used* in `service/uploader.py`, but it is *defined* elsewhere in the
package.

Task: report the exact integer value of `UPLOAD_MAX_ATTEMPTS` as it is actually
defined in the source.

Rules:
- Read the source. Do not infer the value from the variable name, from the
  comment near its use site, or from what a "reasonable default" would be — find
  the definition and read it.
- Answer with the integer only, on its own line, as your final message.
