Integration: 2026.w39

- #578 oru: retain fractional symbol time in the UTC anchor
- #574 oru: retain wideband downlink fragments without counting discarded IQ
- #401 fix(nr-phy): avoid invalid SRS outputs after detection failure
- #575 oru: track uplink sequence numbers per eAxC
- #561 fix (mac): common HARQ-ACK PUCCH overlap and pucch-ResourceCommon at DCI
- #593 fix(mac, nr_ue): ignore configured DMRS additional position for DCI 0-0
- #520 nas: UE-initiated Service Request on idle TUN UL
- #589 ci: Add O-RU label support
- #581 ci: fix bandwidth in 40 MHz M-plane test description
- #588 CI python: cleanup
- #601 Some cleanup towards sidelink integration
- #436 [NR UE][PDSCH] Reduce PDSCH scratch buffer footprint and fuse LLR with layer demapping
- #540 ci: unittest image cleanup, minor updates
- #576 oru: pad uncompressed PRACH payloads to their advertised PRB count
- #530 XNAP: Add encode/decode+unit tests for RETRIEVE UE CONTEXT (initiating, successful and unsuccessful outcome)
- #568 feat(ci): add script-based log collection
- Grant NET_ADMIN capability to UE in phytest vrtsim deployment
- ci: Update average timing value in vrtsim UE phytest

Closes: #493