Copy Up from //p4-sdp/dev_rebrand into //p4-sdp/dev.
This is the first promotion of dev_rebrand's work into dev since
dev_rebrand was created (2025-05-24) -- 303 files, covering the entire
2026.1 rebranding effort (SDP-1379), the Secure By Default adaptation
(SDP-1350), OrgName-aware auth.id/ServerID (SDP-1286), RCS-keyword
version identification (SDP-1161/SDP-799), and the Streams-native release
process redesign (Task 5) done this session, plus everything else
accumulated in dev_rebrand's history before this session.
Per the Merge Down/Copy Up flow, this is intentionally a full,
unconditional blast-replace of dev's content from dev_rebrand -- all
selectivity/care happened in the preceding Merge Down (dev -> dev_rebrand,
changes 33407-33408), which absorbed Robert Cowham's independent dev-side
work first so nothing of his is lost by this Copy Up.
Two files are worth calling out since they might look alarming in
isolation:
- tools/mdcu.sh is deleted -- intentional, retired this session in favor
of the two direct Streams commands now documented in
doc/ReleaseProcessOverview.md.
- tools/ReleaseProcessOverview.md is deleted -- this is a stale relic of
a file move dev_rebrand made back in 2025-05-24 (tools/ -> doc/) that
was never previously propagated to dev; the current, fully-rewritten
doc/ReleaseProcessOverview.md is added/updated correctly by this same
changelist.