Feature: Implement V0 Episodic Context Manager

- Re-wrote the monolithic string-based context manipulation logic into an elegant, immutable Episodic IR pipeline.
- Implemented four non-destructive degradation processors: `HistorySquashingProcessor`, `ToolMaskingProcessor`, `BlobDegradationProcessor`, and `SemanticCompressionProcessor`.
- Added dynamic configuration knobs (`budget` and `strategies`) to precisely tune the retention algorithms.
- Implemented a power-user `incrementalGc` flag for maximum context preservation beneath the ceiling.
- Enforced strict typing across the new pipeline, replacing unsafe casts with robust mapping interfaces.
- Added `powerUserProfile` to support features for those wanting a bit
  more quality at the cost of tokens.

packages/cli/src/config/settingsSchema.ts

@@ -2149,6 +2149,15 @@ const SETTINGS_SCHEMA = {
           'Replace the built-in save_memory tool with a memory manager subagent that supports adding, removing, de-duplicating, and organizing memories.',
         showInDialog: true,
       },
+      powerUserProfile: {
+        type: 'boolean',
+        label: 'Use the power user profile for massive contexts.',
+        category: 'Experimental',
+        requiresRestart: true,
+        default: false,
+        description: 'Enables continuous minimal GC near the max tokens limit instead of a blocked backbuffer.',
+        showInDialog: true,
+      },
       generalistProfile: {
         type: 'boolean',
         label: 'Use the generalist profile to manage agent contexts.',