cdc: provide a warning when creating a changefeed with a cursor that's too far in the past about cockroach HOT 4 OPEN

cc @cockroachdb/cdc

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Hi @rharding6373, would like to take this up as my good first ticket to start contributing to cockroachDB. I tried debugging this issue locally, but was prompted for enterprise credentials. Is there a document that I can follow to get my enterprise free trial keys?

from cockroach.

Hi @sksDonni, thanks for your interest in contributing! If you need a license, you can get a free trial by messaging our sales team following the instructions here: https://www.cockroachlabs.com/docs/stable/licensing-faqs#obtain-a-license

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Alternatively, you can also pick up another good first issue that isn't in the enterprise portion of the database code: https://github.com/cockroachdb/cockroach/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22

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