feat: introduce Wiggum Break as named circuit breaker

Replaces generic "circuit breaker" with "Wiggum Break" — policy enforcement
halt condition named after Chief Wiggum (policy + Ralph Loop's dad).
Hard breaks (immediate halt) and soft breaks (finish then halt) with
wiggum.break event type. Updated both papers and shadow-detection skill.

paper/taxonomy.tex

@@ -661,7 +661,8 @@ this three-layer architecture, though without explicitly naming all methods:
   sprint mode with WIP-limited parallel dispatch (implicit Kanban).
   \item \textbf{Quality}: Shadow detection (behavioral FMEA for agent
   failure modes); effectiveness scoring (rudimentary SPC); Guardian
-  fast-path (TOC---don't waste the bottleneck on clean code).
+  fast-path (TOC---don't waste the bottleneck on clean code); ``Wiggum
+  Break'' circuit breakers (hard/soft halt conditions with event logging).
 \end{itemize}
 
 The gap is in explicit TOC application (identifying and optimizing around