feat(schema): v1.2.0 substrate schema + stage display map (v0.18.0)
Pipeline v2 Phase 1, commit 1/4. Five new dbDelta-idempotent tables
(prompts, run_sources, run_decisions, runs, run_stages), additive
nullable agent_role + prompt_version columns on generation_log,
PRAUTOBLOGGER_DB_VERSION 1.1.0 -> 1.2.0 (existing on_check_db_version
auto-migration re-runs the installers on mismatch), Stage_Display_Map
covering historical + image + v2 stage vocabulary with humanizing
fallback, uninstall coverage for all new tables + full cron hook list,
ARCHITECTURE edit->polish canonicalization + schema docs + decision #22.
No behavior change: nothing reads the new tables yet.
Agent-Session: pipeline-v2-phase1-engineer-20260612
1704d7f3a6