The §18 warning path had no delivery channel at all: no Warner implementation
existed, `felis reaper` passed nil, and maybeWarn still stamped warned_3d_at/
warned_1d_at and counted `warned=N`. So every owned server was silently reaped
15 days after its last join with no notice, and the operator's only feedback
said warnings were sent. Two changes close that:
- Honest stamps: warned_* now records a DELIVERED notice. A nil Warner logs
`warning suppressed — no warner wired` and does NOT stamp; a delivery error
logs and retries on the next daily run (bounded by the warning window). The
stamps are no longer burned by notices nobody received.
- A real channel: mail.SendNotice (the second and last message shape the mail
package sends) plus a mailWarner that resolves the owner's VERIFIED email
and mails the notice through the configured [smtp] relay. `felis reaper`
wires it when [smtp] is set (same password_ref convention as felis-api) and
prints exactly what happens when it is not.
Plumbing so the in-cluster CronJob can actually reach the relay: the reaper
pod gets the optional FELIS_SMTP_PASSWORD env (same Secret as felis-api), and
the "configure email" screen now refreshes the minecraft-namespace mirrors of
felis-smtp AND felis-config (a secretKeyRef is namespace-local, and the config
mirror is what carries [smtp] into the reaper's own config). `felis setup`'s
replica list gains felis-smtp for fresh installs.
Tests: the delivered/retried/suppressed matrix in internal/reaper (the old
"stamp advances on failure" contract is deliberately replaced), the notice
message shape, the warner's resolve/send/failure paths, and the CronJob's
optional-secret env. docs/troubleshooting.md §10 now states the real semantics.