thesis: seed 5 Architect positioning framings into the Workshop (v0.1.0:58)

Saves the 2026-06-05 Architect positioning pass as competing CANDIDATE options
under the core line's positioning variant group, beside Option A/B: Convergence
(47/60), Access (40), Asymmetry (36), Scarcity/chokepoints (35), Freedom-tech (28),
each with its red-team weakness inline. One-time, additive, non-canonical
(guardrail #4); idempotent via an interaction_log sentinel so a partner-deleted
option is never resurrected. ensure_positioning_framings runs after the v5 seed.
Test: test_positioning_framings.py (count/candidacy/idempotency/no-resurrection/log).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/server.py

@@ -478,6 +478,13 @@ def init_db():
     except Exception as _e:
         print(f"[thesis] seed warning: {_e}")
 
+    # One-time: add the 2026-06-05 Architect positioning framings as candidate options.
+    try:
+        from thesis_seed import ensure_positioning_framings as _ensure_positioning_framings
+        _ensure_positioning_framings(conn)
+    except Exception as _e:
+        print(f"[thesis] positioning framings warning: {_e}")
+
     conn.close()
     print(f"Database initialized at {DB_PATH}")