feat(pp): log redaction

[favonia]

Close #649.

• [x] Define all "private" data types
• [ ] Implement the redaction of domain
  • [x] Domains in config.Print
• [ ] Check the redaction of token
  • [ ] Errors from net #603
• [ ] The data type dns-resource-id
  • [ ] Zone IDs and record IDs in api
• [ ] The data type linux-id
  • [ ] user IDs
  • [ ] group IDs
• [ ] Implement the un-redaction (for min mode)
  • [ ] Reveal URLs of custom provider
  • [ ] Reveal shoutrrr service URLs
  • [ ] Reveal Cloudflare tokens
  • [ ] Reveal Healthchecks URLs
  • [ ] Reveal Uptime Kuma URLs
• [ ] Warn about revealing tokens
• [x] Warn about weird configurations (e.g., hiding IPs while Proxied=false)
• [ ] Document the new option

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 46.96970% with 35 lines in your changes missing coverage. Please review.

Project coverage is 89.09%. Comparing base (3b42131) to head (8cfecb6). Report is 1 commits behind head on main.

Files	Patch %	Lines
internal/config/env_base.go	10.52%	17 Missing :warning:
internal/config/config_print.go	28.57%	4 Missing and 6 partials :warning:
internal/pp/fmt.go	83.33%	5 Missing :warning:
internal/config/config_read.go	0.00%	2 Missing :warning:
cmd/ddns/ddns.go	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #785 +/- ## ========================================== - Coverage 90.48% 89.09% -1.39% ========================================== Files 52 52 Lines 2196 2228 +32 ========================================== - Hits 1987 1985 -2 - Misses 198 226 +28 - Partials 11 17 +6 ``` | [Flag](https://app.codecov.io/gh/favonia/cloudflare-ddns/pull/785/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=favonia) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/favonia/cloudflare-ddns/pull/785/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=favonia) | `89.09% <46.96%> (-1.39%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=favonia#carryforward-flags-in-the-pull-request-comment) to find out more.

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