Bugfixes and improved alignment with architecture blueprint

internal/profile/testdata/json_schema_missing_path.yaml

@@ -0,0 +1,8 @@
+id: json-schema-missing-path
+version: "1.0.0"
+templates:
+  - role: user
+    content: "Return JSON"
+output_format: json
+validation:
+  validation_mode: json_schema

internal/profile/testdata/valid.yaml

@@ -1,14 +1,14 @@
 id: test-profile
-version: 1.0.0
+version: "1.0.0"
 description: A valid test profile
 expected_inputs:
   - transcript
   - glossary
 templates:
   - role: system
-    content: You are a helpful assistant.
+    content: "You are a helpful assistant."
   - role: user
-    content: Analyze this: {{.transcript}}
+    content: 'Analyze this: {{input "transcript"}}'
 model_defaults:
   model: gpt-4o
   temperature: 0.7