feat: n8n_deploy_template deploy-first with auto-fix (v2.27.2) (#457)

* feat: n8n_deploy_template deploy-first with auto-fix (v2.27.2)

Improved template deployment to deploy first, then automatically fix common
issues. This dramatically improves deployment success rates for templates
with expression format issues.

Key Changes:
- Deploy-first behavior: templates deployed before validation
- Auto-fix runs automatically after deployment (configurable via `autoFix`)
- Returns `fixesApplied` array showing all corrections made
- Fixed expression validator "nested expressions" false positive
- Fixed Zod schema missing `typeversion-upgrade` and `version-migration` fix types

Testing: 87% deployment success rate across 15 diverse templates

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

* fix: address code review findings for deploy template

Code review fixes:
- CRITICAL: Update test schema to use `autoFix` instead of old `validate` parameter
- WARNING: Add `AppliedFix` and `AutofixResultData` interfaces for type safety
- WARNING: Add `autoFixStatus` field to response (success/failed/skipped)
- WARNING: Report auto-fix failure in response message

Changes:
- tests/unit/mcp/handlers-deploy-template.test.ts: Fixed schema and test cases
- src/mcp/handlers-n8n-manager.ts: Added type definitions, autoFixStatus tracking
- src/mcp/tool-docs/workflow_management/n8n-deploy-template.ts: Updated docs

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/services/expression-validator.ts

@@ -97,12 +97,12 @@ export class ExpressionValidator {
       errors.push('Unmatched expression brackets {{ }}');
     }
 
-    // Check for nested expressions (not supported in n8n)
-    if (expression.includes('{{') && expression.includes('{{', expression.indexOf('{{') + 2)) {
-      const match = expression.match(/\{\{.*\{\{/);
-      if (match) {
-        errors.push('Nested expressions are not supported');
-      }
+    // Check for truly nested expressions (not supported in n8n)
+    // This means {{ inside another {{ }}, like {{ {{ $json }} }}
+    // NOT multiple expressions like {{ $json.a }} text {{ $json.b }} (which is valid)
+    const nestedPattern = /\{\{[^}]*\{\{/;
+    if (nestedPattern.test(expression)) {
+      errors.push('Nested expressions are not supported (expression inside another expression)');
     }
 
     // Check for empty expressions