feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

app/models/check_region_result.go

@@ -0,0 +1,33 @@
+package models
+
+import (
+	"time"
+
+	"rsgit.ru/rsmon/rsmon/app/models/concerns"
+)
+
+// CheckRegionResult stores check results from distributed workers by region
+type CheckRegionResult struct {
+	concerns.Model
+	CheckID      int64       `gorm:"index;not null" json:"check_id"`
+	Check        *Check      `gorm:"foreignKey:CheckID" json:"check,omitempty"`
+	RegionCode   string      `gorm:"size:20;not null;index" json:"region_code"`
+	Region       *Region     `gorm:"foreignKey:RegionCode;references:Code" json:"region,omitempty"`
+	WorkerNodeID *int64      `gorm:"index" json:"worker_node_id"`
+	WorkerNode   *WorkerNode `gorm:"foreignKey:WorkerNodeID" json:"worker_node,omitempty"`
+	ExecutedAt   time.Time   `gorm:"not null" json:"executed_at"`
+	State        string      `gorm:"size:10;not null" json:"state"`
+	DurationMs   int64       `json:"duration_ms"`
+	Error        *string     `json:"error"`
+
+	// AggregatedAt is set by app/models/check_aggregator.go once a row has
+	// been folded into a Check.State decision. NULL means "still waiting
+	// for the aggregator"; non-NULL means "this row has already been
+	// counted in a quorum decision and must not be re-counted". The
+	// column is indexed (see check_aggregator.go index helper) so the
+	// per-tick SELECT that finds unaggregated rows is O(matching rows)
+	// rather than scanning the whole table.
+	AggregatedAt *time.Time `gorm:"index" json:"aggregated_at,omitempty"`
+
+	concerns.Timestamped
+}