feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

app/models/subscription.go

@@ -0,0 +1,61 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/datatypes"
+
+	"rsgit.ru/rsmon/rsmon/app/models/concerns"
+)
+
+const (
+	SubscriptionStatusTrialing = "trialing"
+	SubscriptionStatusActive   = "active"
+	SubscriptionStatusPastDue  = "past_due"
+	SubscriptionStatusPaused   = "paused"
+	SubscriptionStatusCanceled = "canceled"
+	SubscriptionStatusExpired  = "expired"
+)
+
+// Subscription is the current billable entitlement for one account. M0 only
+// writes manual subscriptions; provider flows are deliberately deferred.
+type Subscription struct {
+	concerns.Model
+	AccountID              int64          `gorm:"not null;index" json:"account_id"`
+	Account                *Account       `json:"-"`
+	PlanID                 int64          `gorm:"not null;index" json:"plan_id"`
+	Plan                   *Plan          `json:"plan,omitempty"`
+	Provider               string         `gorm:"size:16;not null;default:'manual'" json:"provider"`
+	ProviderSubscriptionID *string        `gorm:"size:128" json:"provider_subscription_id,omitempty"`
+	ProviderCustomerID     *string        `gorm:"size:128" json:"provider_customer_id,omitempty"`
+	Status                 string         `gorm:"size:24;not null;default:'active';index" json:"status"`
+	BillingCycle           string         `gorm:"size:8;not null;default:'monthly'" json:"billing_cycle"`
+	CurrentPeriodStart     *time.Time     `json:"current_period_start,omitempty"`
+	CurrentPeriodEnd       *time.Time     `gorm:"index" json:"current_period_end,omitempty"`
+	TrialEndsAt            *time.Time     `json:"trial_ends_at,omitempty"`
+	CancelAtPeriodEnd      bool           `gorm:"not null;default:false" json:"cancel_at_period_end"`
+	CanceledAt             *time.Time     `json:"canceled_at,omitempty"`
+	Currency               string         `gorm:"size:3;not null" json:"currency"`
+	AmountMinor            int64          `gorm:"not null;default:0" json:"amount_minor"`
+	MetadataJSON           datatypes.JSON `gorm:"type:jsonb;not null;default:'{}'" json:"metadata_json"`
+	concerns.Timestamped
+}
+
+// SubscriptionEvent is an append-only audit record for entitlement changes
+// and provider deliveries. ProviderEventID makes future webhook processing
+// idempotent without coupling the ledger to a specific PSP.
+type SubscriptionEvent struct {
+	concerns.Model
+	SubscriptionID  int64          `gorm:"not null;index" json:"subscription_id"`
+	AccountID       int64          `gorm:"not null;index" json:"account_id"`
+	Provider        string         `gorm:"size:16;not null;default:'manual';uniqueIndex:idx_subscription_events_provider_event,priority:1" json:"provider"`
+	Kind            string         `gorm:"size:32;not null" json:"kind"`
+	FromPlanID      *int64         `json:"from_plan_id,omitempty"`
+	ToPlanID        *int64         `json:"to_plan_id,omitempty"`
+	AmountMinor     *int64         `json:"amount_minor,omitempty"`
+	Currency        string         `gorm:"size:3" json:"currency,omitempty"`
+	ActorUserID     *int64         `json:"actor_user_id,omitempty"`
+	ProviderEventID *string        `gorm:"size:128;uniqueIndex:idx_subscription_events_provider_event,priority:2" json:"provider_event_id,omitempty"`
+	PayloadJSON     datatypes.JSON `gorm:"type:jsonb;not null;default:'{}'" json:"payload_json"`
+	CreatedAt       time.Time      `json:"created_at"`
+}