Cleanup 20250916

Acceptance of switches as agreed at https://forge.3gpp.org/rep/ivas-codec-pc/ivas-codec/-/wikis/Meetings/Reports/2025-09-16%20Technical%20Matters:

• FIX_1995_REVERB_INIT - issue 1995: Fix use-of-uninitialized-value in ivas_binaural_reverb_init() -> accept
• FIX_1372_OSBA_OBJECT_EDITING - VA: issue 1372: Fix OSBA object-editing in BINAURAL_ROOM_IR -> accept
• NONBE_1321_JBM_ASSERT_BITRATE_SWITCHING - FhG: Fix assert being hit in JBM code during rate switching -> accept
• NONBE_FIX_1376_MDCT_CONCEALMENT - FhG: fix concealment artifact in MDCT Stereo with DTX, in case transition frame gets lost -> accept
• NONBE_1377_REND_DIRATT_CONF - Eri: Issue 1377: Error in directivity attenuation configuration for both IVAS_dec and IVAS_rend -> accept