"""
Metrics subsystem — tracks provider latency, success/failure counts,
retries, cache hit ratio, and execution duration.

All metrics are in-process and thread-safe.  Designed to be scraped
by the /stats endpoint.  No external metrics backend (Prometheus etc.)
is required, but the data model is compatible with one.
"""

from metrics.provider_metrics import ProviderMetrics
from metrics.timings import TimingCollector
from metrics.counters import CounterRegistry
from metrics.health_metrics import HealthMetrics
from metrics.collector import MetricsCollector

__all__ = [
    "ProviderMetrics",
    "TimingCollector",
    "CounterRegistry",
    "HealthMetrics",
    "MetricsCollector",
]