Refactor: split prompt definition from execution settings and migrate run contracts to prompt_* + execution_target

internal/profile/testdata/json_schema_missing_path.yaml

@@ -1,5 +1,8 @@
 id: json-schema-missing-path
 version: "1.0.0"
+inputs:
+  - name: transcript
+    required: true
 templates:
   - role: user
     content: "Return JSON"

internal/profile/testdata/missing_id.yaml

@@ -1,5 +1,8 @@
 version: 1.0.0
 description: Missing ID
+inputs:
+  - name: transcript
+    required: true
 templates:
   - role: system
     content: Hello

internal/profile/testdata/negative_timeout.yaml

@@ -1,10 +1,11 @@
 id: negative-timeout
 version: "1.0.0"
+inputs:
+  - name: transcript
+    required: true
 templates:
   - role: user
     content: "Say hi"
-model_defaults:
-  timeout_seconds: -1
 output_format: text
 validation:
   validation_mode: none

internal/profile/testdata/no_templates.yaml

@@ -1,5 +1,8 @@
 id: no-templates
 version: 1.0.0
+inputs:
+  - name: transcript
+    required: true
 templates: []
 output_format: text
 validation:

internal/profile/testdata/valid.yaml

@@ -1,18 +1,19 @@
 id: test-profile
 version: "1.0.0"
-description: A valid test profile
-expected_inputs:
-  - transcript
-  - glossary
+default_profile: test-exec
+description: A valid test prompt definition
+inputs:
+  - name: transcript
+    required: true
+    content_type: text/markdown
+  - name: glossary
+    required: false
+    content_type: text/yaml
 templates:
   - role: system
     content: "You are a helpful assistant."
   - role: user
     content: 'Analyze this: {{input "transcript"}}'
-model_defaults:
-  model: gpt-4o
-  temperature: 0.7
-  timeout_seconds: 120
 output_format: markdown
 validation:
   validation_mode: basic