v0.309.0: the fill warning reaches the household in its own language; the root-filesystem disk event pinned end to end (R-521 F7)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/notify/r329_severity_contract_test.go

@@ -57,6 +57,7 @@ var severityArg = map[string]int{
 	"pushEventMsg":       1, // (eventType, severity, key, details, args...)
 	"pushEventMsgSuffix": 1, // (eventType, severity, key, suffix, details, args...)
 	"pushEventBoth":      1, // (eventType, severity, message, messageCustomer, details)
+	"PushEventHousehold": 1, // (eventType, severity, message, household, details)
 }
 
 // knownDynamicSeveritySites are the call sites that pass a VARIABLE rather than a literal, so this
@@ -72,11 +73,12 @@ var knownDynamicSeveritySites = map[string]string{
 	"internal/notify/notifier.go:PushEvent":                `pass-through of its own severity parameter to pushEventBoth — checked at PushEvent's callers`,
 	"internal/notify/notifier.go:pushEventMsg":             `pass-through of its own severity parameter to pushEventBoth — checked at pushEventMsg's callers`,
 	"internal/notify/notifier.go:pushEventMsgSuffix":       `pass-through of its own severity parameter to pushEventBoth — checked at pushEventMsgSuffix's callers`,
+	"internal/notify/notifier.go:PushEventHousehold":       `pass-through of its own severity parameter to pushEventBoth — checked at PushEventHousehold's callers`,
 	"internal/notify/notifier.go:NotifyControllerUpdated":  `local var: "info", or "error" when the update failed`,
 	"internal/notify/notifier.go:NotifyDRCompleted":        `local var: "info", or "warning" when failCount > 0`,
 	"internal/notify/notifier.go:NotifyAgentChannelDown":   `internal/channelhealth's classifier — every severity literal in checker.go is "warning" or "error"`,
 	"internal/notify/notifier.go:NotifyDiskHealthDegraded": `DiskAlertKind.Severity() — pinned behaviourally by TestR329_DiskAlertSeveritiesStillSatisfyTheContract`,
-	"cmd/controller/main.go:main":                          `fillwatch.Band.Severity() in the SetNotify closure — pinned by TestR329_FillwatchNeverEmitsTheEmptySeverity`,
+	"cmd/controller/main.go:fillEventPush":                 `fillwatch.Band.Severity() — pinned by TestR329_FillwatchNeverEmitsTheEmptySeverity`,
 }
 
 func walkControllerFiles(t *testing.T, fn func(path string, fset *token.FileSet, f *ast.File)) {