fix(core): Resolve TypeScript strict mode and ES client API compatibility issues for v3.0.0

- Fix ES client v8+ API: use document/doc instead of body for index/update operations
- Add type assertions (as any) for ES client ILM, template, and search APIs
- Fix strict null checks with proper undefined handling (nullish coalescing)
- Fix MetricsCollector interface to match required method signatures
- Fix Logger.error signature compatibility in plugins
- Resolve TermsQuery type index signature conflict
- Remove sourceMap from tsconfig (handled by tsbuild with inlineSourceMap)

ts/domain/transactions/transaction-manager.ts

@@ -179,8 +179,6 @@ export class TransactionManager {
 
       context.state = 'committing';
 
-      const client = ElasticsearchConnectionManager.getInstance().getClient();
-
       // Execute and commit all operations
       let committed = 0;
       for (const operation of context.operations) {
@@ -285,14 +283,12 @@ export class TransactionManager {
 
       context.state = 'rolling_back';
 
-      const client = ElasticsearchConnectionManager.getInstance().getClient();
-
       // Execute compensation operations in reverse order
       let rolledBack = 0;
       for (let i = context.operations.length - 1; i >= 0; i--) {
         const operation = context.operations[i];
 
-        if (!operation.executed || !operation.compensation) {
+        if (!operation || !operation.executed || !operation.compensation) {
           continue;
         }
 
@@ -449,8 +445,8 @@ export class TransactionManager {
           });
 
           operation.version = {
-            seqNo: result._seq_no!,
-            primaryTerm: result._primary_term!,
+            seqNo: result._seq_no ?? 0,
+            primaryTerm: result._primary_term ?? 0,
           };
 
           operation.originalDocument = result._source;
@@ -466,8 +462,8 @@ export class TransactionManager {
           });
 
           operation.version = {
-            seqNo: result._seq_no,
-            primaryTerm: result._primary_term,
+            seqNo: result._seq_no ?? 0,
+            primaryTerm: result._primary_term ?? 0,
           };
 
           // Create compensation (delete)
@@ -498,8 +494,8 @@ export class TransactionManager {
           const result = await client.index(updateRequest);
 
           operation.version = {
-            seqNo: result._seq_no,
-            primaryTerm: result._primary_term,
+            seqNo: result._seq_no ?? 0,
+            primaryTerm: result._primary_term ?? 0,
           };
 
           // Create compensation (restore original)
@@ -569,7 +565,7 @@ export class TransactionManager {
   private async handleConflict(
     context: TransactionContext,
     operation: TransactionOperation,
-    error: Error,
+    _error: Error,
     callbacks?: TransactionCallbacks
   ): Promise<void> {
     this.stats.totalConflicts++;
@@ -594,14 +590,14 @@ export class TransactionManager {
       case 'abort':
         throw new DocumentConflictError(
           `Version conflict for ${operation.index}/${operation.id}`,
-          { index: operation.index, id: operation.id }
+          `${operation.index}/${operation.id}`
         );
 
       case 'retry':
         if (context.retryAttempts >= context.config.maxRetries) {
           throw new DocumentConflictError(
             `Max retries exceeded for ${operation.index}/${operation.id}`,
-            { index: operation.index, id: operation.id }
+            `${operation.index}/${operation.id}`
           );
         }