fix(schedule,ntp,certificate): errors read as the convention says

[retr0h]

Three more providers onto <domain> <verb>, following osapi-io/specs#245 and #573. 8 files.

schedule     create cron entry: ...        ->  schedule create: ...
             invalid cron entry name       ->  schedule: name must not be empty
ntp          ntp: write file: ...          ->  ntp create: write file: ...
             ntp: chronyc tracking: ...    ->  ntp get: chronyc tracking: ...
certificate  create certificate: ...       ->  certificate create: ...

schedule was still naming cron, which the rename had taken out of every other layer.

ntp used a bare <domain>, so five different operations all reported ntp: and a reader could not tell a failed write from a failed chronyc call.

certificate used <verb> <domain>, the exact mirror of the convention.

One thing worth knowing for the remaining two

Each provider has two name-validation errors, an exact-match and a %q variant:

fmt.Errorf("invalid certificate name: empty")
fmt.Errorf("invalid certificate name %q: must match %s", ...)

The first reads like the whole rule, so the second is easy to miss. certificate's was, until the tests caught it.

Checks

go vet ./... clean. ntp, certificate and schedule all pass. I also grepped the whole repo for every old prefix to catch assertions outside these packages; the only hits are a mock fixture in an ntp handler test (unaffected, and darwin.go returns a bare sentinel), plus log messages and a test name.

Remaining

service uses a bare <domain>, and user has chpasswd failed:, which names a command rather than an operation and stops being true when the implementation changes. 60 errors between them, so they follow separately.

🤖 Generated with Claude Code

https://claude.ai/code/session_01FuKUsHFG1EqZXamffh9M2c

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@           Coverage Diff           @@
##             main     #574   +/-   ##
=======================================
  Coverage   99.95%   99.95%           
=======================================
  Files         501      501           
  Lines       24073    24073           
=======================================
  Hits        24063    24063           
  Misses         10       10           

Files with missing lines	Coverage Δ
internal/provider/node/certificate/debian.go	100.00% <100.00%> (ø)
internal/provider/node/certificate/debian_list.go	100.00% <100.00%> (ø)
internal/provider/node/ntp/debian.go	100.00% <100.00%> (ø)
internal/provider/schedule/cron/debian.go	100.00% <100.00%> (ø)

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