Add run-scoped skill and prompt asset management

backend/skills/builtin/technical_review/SKILL.md

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+---
+name: technical_review
+description: Evaluate price action, momentum, and volatility to judge timing and market regime.
+---
+
+# Technical Review
+
+Use this skill when the task is sensitive to entry timing, trend quality, or short-term market structure.
+
+## Workflow
+
+1. Assess trend direction and strength.
+2. Check momentum and mean-reversion conditions.
+3. Review volatility before making aggressive recommendations.
+4. Convert the setup into a trading view with explicit risk awareness.
+
+## Guardrails
+
+- Distinguish trend continuation from overshoot.
+- Avoid strong conviction when signals conflict.
+- Treat volatility as a sizing input, not only a directional input.