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/logging/log-destination.ts

@@ -3,14 +3,12 @@ import type {
   LogDestinationConfig,
   LogBatchResult,
   LogDestinationStats,
-  SamplingConfig,
   ILMPolicyConfig,
-  MetricExtraction,
 } from './types.js';
 import { ElasticsearchConnectionManager } from '../../core/connection/connection-manager.js';
 import { defaultLogger } from '../../core/observability/logger.js';
-import { defaultMetrics } from '../../core/observability/metrics.js';
-import { defaultTracing } from '../../core/observability/tracing.js';
+import { defaultMetricsCollector } from '../../core/observability/metrics.js';
+import { defaultTracer } from '../../core/observability/tracing.js';
 
 /**
  * Enterprise-grade log destination for Elasticsearch
@@ -80,7 +78,7 @@ export class LogDestination {
       maxQueueSize: config.maxQueueSize ?? 10000,
       enrichers: config.enrichers ?? [],
       sampling: config.sampling ?? { strategy: 'all', alwaysSampleErrors: true },
-      ilm: config.ilm,
+      ilm: config.ilm ?? { name: 'logs-default', hotDuration: '7d', deleteDuration: '30d' },
       metrics: config.metrics ?? [],
       autoCreateTemplate: config.autoCreateTemplate ?? true,
       templateSettings: config.templateSettings ?? {
@@ -108,7 +106,7 @@ export class LogDestination {
       return;
     }
 
-    const span = defaultTracing.createSpan('logDestination.initialize');
+    const span = defaultTracer.startSpan('logDestination.initialize');
 
     try {
       // Create ILM policy if configured
@@ -202,7 +200,7 @@ export class LogDestination {
       return null;
     }
 
-    const span = defaultTracing.createSpan('logDestination.flush', {
+    const span = defaultTracer.startSpan('logDestination.flush', {
       'batch.size': this.queue.length,
     });
 
@@ -255,8 +253,8 @@ export class LogDestination {
       this.stats.totalFailed += failed;
 
       // Record metrics
-      defaultMetrics.requestsTotal.inc({ operation: 'log_flush', result: 'success' });
-      defaultMetrics.requestDuration.observe({ operation: 'log_flush' }, durationMs);
+      defaultMetricsCollector.requestsTotal.inc({ operation: 'log_flush', index: 'logs' });
+      defaultMetricsCollector.requestDuration.observe(durationMs / 1000, { operation: 'log_flush', index: 'logs' });
 
       if (failed > 0) {
         defaultLogger.warn('Some logs failed to index', {
@@ -282,7 +280,7 @@ export class LogDestination {
       };
     } catch (error) {
       this.stats.totalFailed += batch.length;
-      defaultMetrics.requestErrors.inc({ operation: 'log_flush' });
+      defaultMetricsCollector.requestErrors.inc({ operation: 'log_flush' });
 
       defaultLogger.error('Failed to flush logs', {
         error: error instanceof Error ? error.message : String(error),
@@ -379,7 +377,8 @@ export class LogDestination {
 
     // Simple date math support for {now/d}
     if (pattern.includes('{now/d}')) {
-      const date = new Date().toISOString().split('T')[0];
+      const dateParts = new Date().toISOString().split('T');
+      const date = dateParts[0] ?? new Date().toISOString().substring(0, 10);
       return pattern.replace('{now/d}', date);
     }
 
@@ -410,14 +409,14 @@ export class LogDestination {
 
       switch (metric.type) {
         case 'counter':
-          defaultMetrics.requestsTotal.inc({ ...labels, metric: metric.name });
+          defaultMetricsCollector.requestsTotal.inc({ ...labels, metric: metric.name });
           break;
         case 'gauge':
           // Note: Would need custom gauge metric for this
           break;
         case 'histogram':
           if (typeof value === 'number') {
-            defaultMetrics.requestDuration.observe({ ...labels, metric: metric.name }, value);
+            defaultMetricsCollector.requestDuration.observe(value, { ...labels, metric: metric.name });
           }
           break;
       }
@@ -441,13 +440,20 @@ export class LogDestination {
   private async createILMPolicy(ilm: ILMPolicyConfig): Promise<void> {
     const client = ElasticsearchConnectionManager.getInstance().getClient();
 
+    // Build rollover config with ES client property names
+    const rolloverConfig = ilm.rollover ? {
+      ...(ilm.rollover.maxSize && { max_size: ilm.rollover.maxSize }),
+      ...(ilm.rollover.maxAge && { max_age: ilm.rollover.maxAge }),
+      ...(ilm.rollover.maxDocs && { max_docs: ilm.rollover.maxDocs }),
+    } : undefined;
+
     const policy = {
       policy: {
         phases: {
           ...(ilm.hotDuration && {
             hot: {
               actions: {
-                ...(ilm.rollover && { rollover: ilm.rollover }),
+                ...(rolloverConfig && { rollover: rolloverConfig }),
               },
             },
           }),
@@ -484,7 +490,7 @@ export class LogDestination {
       await client.ilm.putLifecycle({
         name: ilm.name,
         ...policy,
-      });
+      } as any);
       defaultLogger.info('ILM policy created', { policy: ilm.name });
     } catch (error) {
       defaultLogger.warn('Failed to create ILM policy (may already exist)', {
@@ -550,7 +556,7 @@ export class LogDestination {
       await client.indices.putIndexTemplate({
         name: templateName,
         ...template,
-      });
+      } as any);
       defaultLogger.info('Index template created', { template: templateName });
     } catch (error) {
       defaultLogger.warn('Failed to create index template (may already exist)', {