Initialize baseline seed, four baseline docs (project-structure,
runtime-flows, interface-contract, data-model), and the active
discovery/srs/batches/releases indexes. Content derived from the
trex-orbit slot pure-domain migration plan (trex-core as a new base,
pure domain only).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
