export interface ControllerUsageStats {  totals: {    total_requests: number;    successful_requests: number;    failed_requests: number;    success_rate: number;  };  latency: {    avg_ms: number | null;    max_ms: number | null;  };  recent_activity: {    last_hour_requests: number;    last_24h_requests: number;    last_24h_failed_requests: number;  };  by_path: Array<{    method: string;    path: string;    requests: number;    successful: number;    failed: number;    success_rate: number;    avg_duration_ms: number | null;    max_duration_ms: number | null;  }>;  by_status: Array<{    status: number;    requests: number;  }>;  recent_errors: Array<{    method: string;    path: string;    status: number;    error_class: string | null;    error_message: string | null;    created_at: string;  }>;  function_calls?: {    totals: {      total_calls: number;      successful_calls: number;      failed_calls: number;      success_rate: number;    };    latency: {      avg_ms: number | null;      max_ms: number | null;    };    by_function: Array<{      function_name: string;      calls: number;      successful: number;      failed: number;      success_rate: number;      avg_duration_ms: number | null;      max_duration_ms: number | null;    }>;    recent_errors: Array<{      function_name: string;      error_class: string | null;      error_message: string | null;      created_at: string;    }>;  };} export interface UsageStats {  totals: {    total_tokens: number;    prompt_tokens: number;    completion_tokens: number;    total_requests: number;    successful_requests: number;    failed_requests: number;    success_rate: number;    unique_sessions: number;    unique_users: number;  };  latency: {    avg_ms: number | null;    p50_ms: number | null;    p95_ms: number | null;    p99_ms: number | null;    min_ms: number | null;    max_ms: number | null;  };  ttft: {    avg_ms: number | null;    p50_ms: number | null;    p95_ms: number | null;    p99_ms: number | null;  };  tokens_per_request: {    avg: number;    avg_prompt: number;    avg_completion: number;    max: number;    p50: number;    p95: number;  };  cache: {    hits: number;    misses: number;    hit_tokens: number;    miss_tokens: number;    hit_rate: number;  };  week_over_week: {    this_week: {      requests: number;      tokens: number;      successful: number;    };    last_week: {      requests: number;      tokens: number;      successful: number;    };    change_pct: {      requests: number | null;      tokens: number | null;    };  };  recent_activity: {    last_hour_requests: number;    last_24h_requests: number;    prev_24h_requests: number;    last_24h_tokens: number;    change_24h_pct: number | null;  };  peak_days: Array<{    date: string;    requests: number;    tokens: number;  }>;  peak_hours: Array<{    hour: number;    requests: number;  }>;  by_model: Array<{    model: string;    requests: number;    successful: number;    success_rate: number;    total_tokens: number;    prompt_tokens: number;    completion_tokens: number;    avg_tokens: number;    avg_latency_ms: number | null;    p50_latency_ms: number | null;    avg_ttft_ms: number | null;    tokens_per_sec: number | null;    prefill_tps: number | null;    generation_tps: number | null;  }>;  daily: Array<{    date: string;    requests: number;    successful: number;    success_rate: number;    total_tokens: number;    prompt_tokens: number;    completion_tokens: number;    avg_latency_ms: number;  }>;  daily_by_model?: Array<{    date: string;    model: string;    requests: number;    successful: number;    success_rate: number;    total_tokens: number;    prompt_tokens: number;    completion_tokens: number;  }>;  hourly_pattern: Array<{    hour: number;    requests: number;    successful: number;    tokens: number;  }>;  controller?: ControllerUsageStats;}