feat(02-01): upgrade OpenAI and Anthropic provider YAMLs

- OpenAI: add sk-svcacct- and legacy T3BlbkFJ patterns
- Anthropic: add api03 AA suffix and sk-ant-admin01- pattern
- Sync both to pkg/providers/definitions/ for go:embed

providers/openai.yaml

@@ -2,14 +2,23 @@ format_version: 1
 name: openai
 display_name: OpenAI
 tier: 1
-last_verified: "2026-04-04"
+last_verified: "2026-04-05"
 keywords:
   - "sk-proj-"
+  - "sk-svcacct-"
+  - "sk-none-"
   - "openai"
+  - "t3blbkfj"
 patterns:
   - regex: 'sk-proj-[A-Za-z0-9_\-]{48,}'
     entropy_min: 3.5
     confidence: high
+  - regex: 'sk-svcacct-[A-Za-z0-9_\-]{48,}'
+    entropy_min: 3.5
+    confidence: high
+  - regex: 'sk-[A-Za-z0-9]{20,}T3BlbkFJ[A-Za-z0-9_\-]{20,}'
+    entropy_min: 3.5
+    confidence: high
 verify:
   method: GET
   url: https://api.openai.com/v1/models