* Add fresh context with timeout and same log properties, re-derive logger
* Unify timeout constants
* Move ctx after shortcut that got added through rebasing
* Unify timeouts
* Port opentracing's SpanFromContext and ContextFromSpan to the grafana tracing package
* Support both opentracing and otel variants
* Better document why we're creating a new ctx
* Add new func to FakeSpan which was added after rebase
* Support grafana-specific traceID key in both tracer implementations
* Copy rules instead of accepting pointer
* Deep-copy the rule, for even more guarantees
* Create struct just for needed fields
* Move RuleMeta to historian/model package, iron out package dependencies
* Move tests for dash ID parsing to model package along with code
