Werk #15370: oracle_instance: fix reporting of restricted logins

Component	Checks & agents
Title	oracle_instance: fix reporting of restricted logins
Date	Jul 24, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.4.0p9 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0p36 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Previously logins were not correctly reported:

1. they were only shown if the openmode was OPEN but not if they were READ ONLY or READ WRITE
2. the logic whether a database is restricted was inverted

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