Receive: initialize default tenant on start in receiver

[MichaHoffmann]

• I added CHANGELOG entry for this change.
• Change is not relevant to the end user.

Changes

Initialize default tenant when starting receiver so we dont fail writes while starting the tsdb.

Verification

Not yet

[yeya24]

Initialize default tenant when starting receiver so we dont fail writes while starting the tsdb.

What caused the writes to fail? Because the default tenant's TSDB has not been initialized?

Then the problem exits for all tenants. Feels like not that useful by initializing default tenant only.

[MichaHoffmann]

Initialize default tenant when starting receiver so we dont fail writes while starting the tsdb.

What caused the writes to fail? Because the default tenant's TSDB has not been initialized?

Then the problem exits for all tenants. Feels like not that useful by initializing default tenant only.

But its the one tenant that we know before already

[yeya24]

But its the one tenant that we know before already

Why? Default tenant might not even exists. We should be able to persist existing tenant information somewhere at receiver