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>

src/services/workflow-auto-fixer.ts

@@ -671,11 +671,13 @@ export class WorkflowAutoFixer {
     filteredFixes: FixOperation[],
     allFixes: FixOperation[]
   ): WorkflowDiffOperation[] {
+    // fixedNodes contains node names (FixOperation.node = node.name)
     const fixedNodes = new Set(filteredFixes.map(f => f.node));
     const hasConnectionFixes = filteredFixes.some(f => CONNECTION_FIX_TYPES.includes(f.type));
     return operations.filter(op => {
       if (op.type === 'updateNode') {
-        return fixedNodes.has(op.nodeId || '');
+        // Check both nodeName and nodeId — operations may use either
+        return fixedNodes.has(op.nodeName || '') || fixedNodes.has(op.nodeId || '');
       }
       if (op.type === 'replaceConnections') {
         return hasConnectionFixes;
@@ -1186,10 +1188,11 @@ export class WorkflowAutoFixer {
           description: `Upgrade ${node.name} from v${currentVersion} to v${latestVersion}. ${analysis.reason}`
         });
 
-        // Create update operation
+        // Create update operation — both nodeId and nodeName needed for fix filtering
         const operation: UpdateNodeOperation = {
           type: 'updateNode',
           nodeId: node.id,
+          nodeName: node.name,
           updates: {
             typeVersion: parseFloat(latestVersion),
             parameters: migrationResult.updatedNode.parameters,