Decide on which db.system values to mark stable as part of initial db semconv stability

[trask]

Tracking / blocking issue for initial database semconv stability.

[trask]

Proposal, factoring in the expertise we have within the database working group:

• mssql
• postgresql
• mysql
• cosmosdb
• elasticsearch

Others that would be nice, based on popularity:

• redis
• mongodb

[trask]

I suggest we not include hbase in the initial stability, as it will be good to sync with hbase native instrumentation prior to stabilizing anything related to hbase (see #742)

[trask]

• sql

there's no db.system constant for sql, should we remove the sql.md page?

but then what to do since there's no oracle, postgresql pages?

==> so keep sql page to document any db.system that implement sql

[trask]

what about picking a timeseries database and a vector database?

[gregkalapos]

WG Meeting:
From OTel community day: Redis and Postgres cover a lot - should be marked as stable.