Route estimate outputs to central archive (ourdigital-space/estimates)

All estimates now archive to ~/Workspaces/ourdigital-space/estimates/
<YYYY-MM-DD>_<prospect|account>_<service>/ (single 견적 archive). Engine
SKILL.md documents the output-home convention (engine stays --out-dir-agnostic).
presales-seo Stage 5 writes the estimate to $EST (archive); Stage 6 deck reads
from $EST but stays in the engagement bundle.

(Workspace side, not in this repo: SHR estimate moved to the archive, pointer
left in the engagement, ourdigital-space/CLAUDE.md documents estimates/.)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

custom-skills/96-ourdigital-estimate-engine/SKILL.md

@@ -54,6 +54,13 @@ Example consumer: `ourdigital-presales-seo` (`findings_to_scope.py` → engine
   real quote data. All current catalogs are real.
 - Rates change in `rate_card.yaml` only (single source). Validate against a known real quote.
 
+## Output location
+Estimates are archived centrally in OurDigital's space:
+`~/Workspaces/ourdigital-space/estimates/<YYYY-MM-DD>_<prospect|account>_<service>/`
+(e.g. `…/estimates/2026-05-27_shr_seo/`). The engine stays `--out-dir`-agnostic — the caller
+passes that path. Client engagements keep their audit docs/deck in their own workspace but the
+견적 lives here (single quote archive).
+
 ## Conventions
 Korean-first output · 부가세 별도 · 유효기간 14d · 현금 · `OD-YYYY-NNN`. Don't invent rates —
 stub and flag instead. Legal entity (주)디인텔리전스 / info@ourdigital.org.