chore: refresh GLM model configs

## Summary
- add GLM-5.2 and GLM-4.7-FlashX to Zhipu provider config
- update GLM context/output/pricing tiers from official BigModel docs and pricing
- align Zhipu Coding Plan with official GLM-5.2, GLM-5-Turbo, and GLM-4.7 availability
- sync existing GLM max output values in DashScope configs
- address Copilot review by using extra.pricingTiers consistently

## Validation
- npm run validate
- npm test
- git diff --check

compute/coding-plans/dashscope-token-plan.json

@@ -133,7 +133,7 @@
       ],
       "description": "百炼 Token Plan，智谱 GLM-5，200K 上下文",
       "contextWindow": 202752,
-      "maxOutputTokens": 128000,
+      "maxOutputTokens": 131072,
       "capabilities": [
         "chat",
         "reasoning",
@@ -169,7 +169,7 @@
       ],
       "description": "百炼 Token Plan，智谱 GLM-4.7，200K 上下文",
       "contextWindow": 200000,
-      "maxOutputTokens": 128000,
+      "maxOutputTokens": 131072,
       "capabilities": [
         "chat",
         "reasoning",