The resolved identity of an ingest request: which tenant and source a catch
URL maps to. Produced by a Ankusa.RouteResolver from the raw Plug.Conn, so
the URL scheme (single path segment, tenant-in-path, opaque token, host
routing) is a pluggable concern the rest of the framework never sees.
source_id— the key aAnkusa.SourceStoreresolves to a%Ankusa.Source{}.tenant_id— the owning tenant.nilmeans "take it from the source", which is the single-tenant / static-config case. A multi-tenant resolver that carries the tenant in the URL sets it explicitly.params— any extra captures the resolver wants to pass through (e.g. an app id, a token scope). Advisory; the hot path ignores it.