v0.3.4: opt-in Overpass endpoint failover
opt-in Overpass endpoint failover
- OSM_OVERPASS_ENDPOINTS: ordered mirror list, rotates on transient failure only (#37)
- servingEndpoint enrichment field on every Overpass tool response, redacted to origin+path (#37)
- 120s total-call time budget bounds retries across endpoints, surfacing endpoints_exhausted
- OSM_OVERPASS_BASE_URL unchanged: still pins one endpoint and disables failover