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

pkg/providers/definitions/anthropic.yaml

@@ -2,12 +2,16 @@ format_version: 1
 name: anthropic
 display_name: Anthropic
 tier: 1
-last_verified: "2026-04-04"
+last_verified: "2026-04-05"
 keywords:
   - "sk-ant-api03-"
+  - "sk-ant-admin01-"
   - "anthropic"
 patterns:
-  - regex: 'sk-ant-api03-[A-Za-z0-9_\-]{93,}'
+  - regex: 'sk-ant-api03-[A-Za-z0-9_\-]{93}AA'
+    entropy_min: 3.5
+    confidence: high
+  - regex: 'sk-ant-admin01-[A-Za-z0-9_\-]{93}AA'
     entropy_min: 3.5
     confidence: high
 verify: