Fix CI failures: add skip markers for type signatures and partial snippets

- Add skip markers to Python type signature definitions (hooks)
- Add skip markers to C# partial config snippets (mcp/debugging.md)
- Add skip markers to Python snippets using undefined variables

Author: patniko

docs/auth/index.md

@@ -253,6 +253,7 @@ const client = new CopilotClient({
 <details>
 <summary><strong>Python</strong></summary>
 
+<!-- docs-validate: skip -->
 ```python
 client = CopilotClient({
     "use_logged_in_user": False,  # Only use explicit tokens

docs/getting-started.md

@@ -426,6 +426,7 @@ unsubscribeIdle();
 <details>
 <summary><strong>Python</strong></summary>
 
+<!-- docs-validate: skip -->
 ```python
 # Subscribe to all events
 unsubscribe = session.on(lambda event: print(f"Event: {event.type}"))

docs/hooks/error-handling.md

@@ -24,6 +24,7 @@ type ErrorOccurredHandler = (
 <details>
 <summary><strong>Python</strong></summary>
 
+<!-- docs-validate: skip -->
 ```python
 ErrorOccurredHandler = Callable[
     [ErrorOccurredHookInput, HookInvocation],

docs/hooks/post-tool-use.md

@@ -24,6 +24,7 @@ type PostToolUseHandler = (
 <details>
 <summary><strong>Python</strong></summary>
 
+<!-- docs-validate: skip -->
 ```python
 PostToolUseHandler = Callable[
     [PostToolUseHookInput, HookInvocation],

docs/hooks/pre-tool-use.md

@@ -24,6 +24,7 @@ type PreToolUseHandler = (
 <details>
 <summary><strong>Python</strong></summary>
 
+<!-- docs-validate: skip -->
 ```python
 PreToolUseHandler = Callable[
     [PreToolUseHookInput, HookInvocation],

docs/hooks/session-lifecycle.md

@@ -28,6 +28,7 @@ type SessionStartHandler = (
 <details>
 <summary><strong>Python</strong></summary>
 
+<!-- docs-validate: skip -->
 ```python
 SessionStartHandler = Callable[
     [SessionStartHookInput, HookInvocation],
@@ -205,6 +206,7 @@ type SessionEndHandler = (
 <details>
 <summary><strong>Python</strong></summary>
 
+<!-- docs-validate: skip -->
 ```python
 SessionEndHandler = Callable[
     [SessionEndHookInput, HookInvocation],

docs/hooks/user-prompt-submitted.md

@@ -24,6 +24,7 @@ type UserPromptSubmittedHandler = (
 <details>
 <summary><strong>Python</strong></summary>
 
+<!-- docs-validate: skip -->
 ```python
 UserPromptSubmittedHandler = Callable[
     [UserPromptSubmittedHookInput, HookInvocation],

docs/mcp/debugging.md

@@ -242,6 +242,7 @@ cd /expected/working/dir
 
 #### .NET Console Apps / Tools
 
+<!-- docs-validate: skip -->
 ```csharp
 // Correct configuration for .NET exe
 ["my-dotnet-server"] = new McpLocalServerConfig
@@ -266,6 +267,7 @@ cd /expected/working/dir
 
 #### NPX Commands
 
+<!-- docs-validate: skip -->
 ```csharp
 // Windows needs cmd /c for npx
 ["filesystem"] = new McpLocalServerConfig