feat(M3-002): implement AnthropicAdapter for Claude Sonnet 4.6, Opus 4.6, and Haiku 4.5 (#309)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

pnpm-lock.yaml

@@ -41,6 +41,9 @@ importers:
 
   apps/gateway:
     dependencies:
+      '@anthropic-ai/sdk':
+        specifier: ^0.80.0
+        version: 0.80.0(zod@4.3.6)
       '@fastify/helmet':
         specifier: ^13.0.2
         version: 13.0.2
@@ -582,6 +585,15 @@ packages:
       zod:
         optional: true
 
+  '@anthropic-ai/sdk@0.80.0':
+    resolution: {integrity: sha512-WeXLn7zNVk3yjeshn+xZHvld6AoFUOR3Sep6pSoHho5YbSi6HwcirqgPA5ccFuW8QTVJAAU7N8uQQC6Wa9TG+g==}
+    hasBin: true
+    peerDependencies:
+      zod: ^3.25.0 || ^4.0.0
+    peerDependenciesMeta:
+      zod:
+        optional: true
+
   '@asamuzakjp/css-color@5.0.1':
     resolution: {integrity: sha512-2SZFvqMyvboVV1d15lMf7XiI3m7SDqXUuKaTymJYLN6dSGadqp+fVojqJlVoMlbZnlTmu3S0TLwLTJpvBMO1Aw==}
     engines: {node: ^20.19.0 || ^22.12.0 || >=24.0.0}
@@ -5937,6 +5949,12 @@ snapshots:
     optionalDependencies:
       zod: 4.3.6
 
+  '@anthropic-ai/sdk@0.80.0(zod@4.3.6)':
+    dependencies:
+      json-schema-to-ts: 3.1.1
+    optionalDependencies:
+      zod: 4.3.6
+
   '@asamuzakjp/css-color@5.0.1':
     dependencies:
       '@csstools/css-calc': 3.1.1(@csstools/css-parser-algorithms@4.0.0(@csstools/css-tokenizer@4.0.0))(@csstools/css-tokenizer@4.0.0)