fix: field normalization, AI connection validation, autofix filter (#581) (#638)

- Normalize name→nodeName and id→nodeId for node-targeting operations in
  the Zod schema transform, so LLMs using natural field names no longer
  get "Node not found" errors
- Replace hardcoded ALL_CONNECTION_TYPES with dynamic iteration so AI
  sub-nodes (ai_outputParser, ai_document, ai_textSplitter, etc.) are
  not flagged as disconnected during save
- Add .catchall() to workflowConnectionSchema and extend connection
  reference validation to cover all connection types, not just main
- Fix filterOperationsByFixes ID-vs-name mismatch: typeversion-upgrade
  operations now include nodeName alongside nodeId, and the filter checks
  both fields

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

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

dist/services/workflow-auto-fixer.js

@@ -405,7 +405,7 @@ class WorkflowAutoFixer {
         const hasConnectionFixes = filteredFixes.some(f => exports.CONNECTION_FIX_TYPES.includes(f.type));
         return operations.filter(op => {
             if (op.type === 'updateNode') {
-                return fixedNodes.has(op.nodeId || '');
+                return fixedNodes.has(op.nodeName || '') || fixedNodes.has(op.nodeId || '');
             }
             if (op.type === 'replaceConnections') {
                 return hasConnectionFixes;
@@ -794,6 +794,7 @@ class WorkflowAutoFixer {
                 const operation = {
                     type: 'updateNode',
                     nodeId: node.id,
+                    nodeName: node.name,
                     updates: {
                         typeVersion: parseFloat(latestVersion),
                         parameters: migrationResult.updatedNode.parameters,