refactor: streamline paired room prompts and fix role separation

Prompts:
- Remove model-specific names (클코, Codex) — use owner/reviewer only
- Compress duplicated sections (communication, stagnation, consensus)
  while preserving 4 ontological questions and verdict protocol intact
- Remove verdict examples (redundant with status descriptions)
- claude-platform.md: strip SDK defaults, keep only send_message rules

Code:
- Remove reviewer paired room prompt from owner CLAUDE.md
  (was causing role confusion — owner got "You are the reviewer")
- Remove "Provide feedback or approve" from review turn prompt
  (conflicted with CLAUDE.md verdict protocol)

187 lines → 100 lines across 4 prompt files.

src/agent-runner-environment.ts

@@ -453,11 +453,13 @@ export function prepareGroupEnvironment(
     !isMain && fs.existsSync(globalClaudeMdPath)
       ? fs.readFileSync(globalClaudeMdPath, 'utf-8').trim()
       : undefined;
+  // Owner CLAUDE.md: platform rules + owner paired room rules.
+  // Reviewer paired room rules are NOT included — those belong to the
+  // container reviewer only (via prepareContainerSessionEnvironment).
   const sessionClaudeMd = [
     ownerCommonPlatformPrompt,
     claudePlatformPrompt,
     ownerCommonPairedRoomPrompt,
-    claudePairedRoomPrompt,
     globalClaudeMemory,
     options?.memoryBriefing,
   ]