branch-4.1: [fix](auth)Fix arrow flight client ip auth #63506#63592
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## Changes In Doris 4.1.0, Arrow Flight SQL authentication may fail for users created with a specific host/IP. Example input: ```sql CREATE USER 'read_user'@'192.0.2.10' IDENTIFIED BY '12345'; GRANT SELECT_PRIV ON *.* TO 'read_user'@'192.0.2.10'; ``` Then connect through Arrow Flight SQL with the same username and password, for example by ADBC/Python or Arrow Flight JDBC. Actual wrong output: ``` UNAUTHENTICATED: [FlightSQL] Unable to authenticate user read_user, exception: errCode = 2, detailMessage = Access denied for user 'read_user@0.0.0.0' (using password: YES) ``` Expected output: ``` The user should be authenticated as the real remote client identity, for example: read_user@192.0.2.10 and the connection should succeed when the password and privileges match that user@host. ``` Root cause: Arrow Flight SQL previously used hardcoded remote IP 0.0.0.0 during username/password authentication. As a result, Doris matched the wrong user@host entry instead of using the actual client IP from the gRPC connection. This PR fixes Arrow Flight SQL authentication to use the real gRPC peer IP when validating credentials.
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yiguolei
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May 25, 2026
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Cherry-picked from #63506