chore: update model references to Claude 4.6 and GPT-5.2

- Claude Opus 4.5 → Opus 4.6, Claude Sonnet 4.5 → Sonnet 4.6 (Haiku stays 4.5)
- Update claude-sonnet-4-5 model IDs to claude-sonnet-4-6 in code examples
- Update SWE-bench stat from 80.9% to 80.8% for Opus 4.6
- Update GPT refs: GPT-5 → GPT-5.2, GPT-4o → gpt-5.2, GPT-4o-mini → GPT-5-mini
- Fix GPT-5.2-mini → GPT-5-mini (correct model name per OpenAI)
- Bump marketplace to v1.5.2 and affected plugin versions

plugins/llm-application-dev/commands/prompt-optimize.md

@@ -150,7 +150,7 @@ gpt5_optimized = """
 
 ````
 
-**Claude 4.5/4**
+**Claude 4.6/4.5**
 ```python
 claude_optimized = """
 <context>
@@ -607,7 +607,7 @@ testing_recommendations:
   metrics: ["accuracy", "satisfaction", "cost"]
 
 deployment_strategy:
-  model: "GPT-5.2 for quality, Claude 4.5 for safety"
+  model: "GPT-5.2 for quality, Claude 4.6 for safety"
   temperature: 0.7
   max_tokens: 2000
   monitoring: "Track success, latency, feedback"