infra/relay/src/environments/ManagedEndpointAllocations.test.ts |  93 +++++++
 infra/relay/src/environments/ManagedEndpointAllocations.ts      | 133 +++++++--
 infra/relay/src/environments/ManagedEndpointProvider.test.ts    |  88 +++++-
 infra/relay/src/environments/ManagedEndpointProvider.ts         | 468 ++++++++++++++++++++++++++------
 4 files changed, 678 insertions(+), 104 deletions(-)