Additionally, several of @fluidframework/telemetry-utils's exports are being marked as internal and should not be consumed outside of other FF packages.
## Some stack traces are improved
Some stack traces have been improved and might now include frames for async functions that weren't previously included.
## tree2: Replace ValueSchema.Serializable with FluidHandle
Replace ValueSchema.Serializable with FluidHandle, removing support for arbitrary objects as tree values and preventing "any" type from Serializable from infecting TreeValue.
## tree2: Restrict struct field names to avoid collisions with schema2 names
Struct field names are now restricted to avoid collisions with schema2 names.