feat: expose monitoring tg ai job health

internal/aiservice/client.go

@@ -83,6 +83,41 @@ type ProviderStatus struct {
 	Error      string `json:"error,omitempty"`
 }
 
+type Stats struct {
+	At      time.Time     `json:"at"`
+	Owners  []OwnerStat   `json:"owners,omitempty"`
+	Errors  []ErrorStat   `json:"errors,omitempty"`
+	Backlog []BacklogStat `json:"backlog,omitempty"`
+}
+
+type OwnerStat struct {
+	OwnerService string `json:"owner_service"`
+	TaskType     string `json:"task_type"`
+	ModelProfile string `json:"model_profile"`
+	Status       string `json:"status"`
+	Total        int64  `json:"total"`
+}
+
+type ErrorStat struct {
+	OwnerService string `json:"owner_service,omitempty"`
+	TaskType     string `json:"task_type"`
+	ModelProfile string `json:"model_profile"`
+	ErrorCode    string `json:"error_code"`
+	Total        int64  `json:"total"`
+	Last24h      int64  `json:"last_24h"`
+}
+
+type BacklogStat struct {
+	OwnerService            string `json:"owner_service"`
+	TaskType                string `json:"task_type"`
+	ModelProfile            string `json:"model_profile"`
+	Pending                 int64  `json:"pending"`
+	Running                 int64  `json:"running"`
+	StaleRunning            int64  `json:"stale_running"`
+	OldestPendingAgeSeconds int64  `json:"oldest_pending_age_seconds"`
+	OldestRunningAgeSeconds int64  `json:"oldest_running_age_seconds"`
+}
+
 func New(baseURL, token string, timeout time.Duration) *Client {
 	baseURL = strings.TrimRight(strings.TrimSpace(baseURL), "/")
 	if baseURL == "" {
@@ -223,6 +258,29 @@ func (c *Client) ProvidersStatus(ctx context.Context) (*ProvidersStatus, error)
 	return &out, nil
 }
 
+func (c *Client) Stats(ctx context.Context) (*Stats, error) {
+	if c == nil {
+		return nil, fmt.Errorf("ai-service not configured")
+	}
+	req, err := c.request(ctx, http.MethodGet, "/api/v1/stats", nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("ai stats: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return nil, fmt.Errorf("ai stats: http %d: %s", resp.StatusCode, readSmall(resp.Body))
+	}
+	var out Stats
+	if err := json.NewDecoder(resp.Body).Decode(&out); err != nil {
+		return nil, fmt.Errorf("decode ai stats: %w", err)
+	}
+	return &out, nil
+}
+
 func (c *Client) request(ctx context.Context, method, path string, body []byte) (*http.Request, error) {
 	var r io.Reader
 	if body != nil {