refactor: remove augmentation system and semantic type matching

Remove the entire augmentation pipeline infrastructure (52 files,
~15,000 lines) and the semantic type matching system. These were
unused middleware layers adding complexity without value.

What was removed:
- src/augmentations/ directory (all augmentation implementations)
- src/augmentationManager.ts (pipeline orchestrator)
- src/types/augmentations.ts, src/types/pipelineTypes.ts
- src/shared/default-augmentations.ts
- Semantic type suggestion (BrainyTypes.suggestNoun/suggestVerb)
- src/utils/typeMatching/ (embedding-based type matcher)

What was preserved by relocating:
- Import handlers (CSV, PDF, Excel) -> src/importers/handlers/
- NeuralImportAugmentation -> src/cortex/neuralImportAugmentation.ts
- Type matching utilities -> heuristic inference in consumers

What was simplified:
- brainy.ts: operations call storage directly (no execute() wrapper)
- IntegrationBase: standalone class (no BaseAugmentation parent)
- BrainyTypes: validation-only (nouns, verbs, isValid*, get*)
- Pipeline: direct execution (no augmentation interception)
- index.ts: removed TypeSuggestion, suggestType exports
- package.json: removed stale types/augmentations export

Build passes, 1176 tests pass, 0 failures.

src/integrations/core/IntegrationBase.ts

@@ -5,11 +5,6 @@
  * for event subscriptions, tabular export, and lifecycle management.
  */
 
-import {
-  BaseAugmentation,
-  AugmentationContext
-} from '../../augmentations/brainyAugmentation.js'
-import { AugmentationManifest } from '../../augmentations/manifest.js'
 import { EventBus } from './EventBus.js'
 import { TabularExporter } from './TabularExporter.js'
 import {
@@ -48,17 +43,12 @@ import { Entity, Relation, FindParams } from '../../types/brainy.types.js'
  * }
  * ```
  */
-export abstract class IntegrationBase extends BaseAugmentation {
-  // Augmentation interface implementation
-  readonly timing = 'after' as const
-  readonly metadata = 'readonly' as const
-  readonly operations: ('all')[] = ['all']
-  readonly priority = 5 // Low priority - runs after main operations
-  category: 'internal' | 'core' | 'premium' | 'community' | 'external' = 'core'
-
+export abstract class IntegrationBase {
   // Shared infrastructure
   protected eventBus: EventBus
   protected exporter: TabularExporter
+  protected config: IntegrationConfig
+  protected context?: { brain: any; storage: any; config: any; log: (message: string, level?: string) => void }
 
   // Integration state
   protected isRunning = false
@@ -80,11 +70,35 @@ export abstract class IntegrationBase extends BaseAugmentation {
     config?: IntegrationConfig,
     exporterConfig?: TabularExporterConfig
   ) {
-    super(config)
+    this.config = config || {}
     this.eventBus = new EventBus()
     this.exporter = new TabularExporter(exporterConfig)
   }
 
+  /**
+   * Log a message
+   */
+  protected log(message: string, level: string = 'info'): void {
+    if (this.context?.log) {
+      this.context.log(message, level)
+    }
+  }
+
+  /**
+   * Initialize the integration with context
+   */
+  async initialize(ctx: { brain: any; storage: any; config: any; log: (message: string, level?: string) => void }): Promise<void> {
+    this.context = ctx
+    await this.onInitialize()
+  }
+
+  /**
+   * Shutdown the integration
+   */
+  async shutdown(): Promise<void> {
+    await this.onShutdown()
+  }
+
   /**
    * Integration name (must be unique)
    */
@@ -311,7 +325,7 @@ export abstract class IntegrationBase extends BaseAugmentation {
    * Get manifest for this integration
    * Subclasses should override this
    */
-  getManifest(): AugmentationManifest {
+  getManifest(): Record<string, any> {
     return {
       id: this.name,
       name: this.name,