tor/changes/ticket40758

  o Minor features (metrics):
    - Add a `reason` label to the HS error metrics.
      Closes ticket 40758.
metrics: Add a `reason` label to the HS error metrics. This adds a `reason` label to the `hs_intro_rejected_intro_req_count` and `hs_rdv_error_count` metrics introduced in #40755. Metric look up and intialization is now more a bit more involved. This may be fine for now, but it will become unwieldy if/when we add more labels (and as such will need to be refactored). Also, in the future, we may want to introduce finer grained `reason` labels. For example, the `invalid_introduce2` label actually covers multiple types of errors that can happen during the processing of an INTRODUCE2 cell (such as cell parse errors, replays, decryption errors). Signed-off-by: Gabriela Moldovan <gabi@torproject.org> 2023-02-15 15:52:35 +01:00			`o Minor features (metrics):`
			- Add a `reason` label to the HS error metrics.
			`Closes ticket 40758.`