Release v4.3.2: User-facing context display via stderr hook

Improvements:
- Added user-message-hook for displaying context to users (src/hooks/user-message-hook.ts)
- Hook fires simultaneously with context injection, sending duplicate message via stderr
- Error messages don't get added to context, enabling user visibility
- Added 4 comprehensive documentation files (2500+ lines total)
- Improved cross-platform path handling in context-hook

Technical changes:
- New: src/hooks/user-message-hook.ts (stderr-based display mechanism)
- New: plugin/scripts/user-message-hook.js (built executable)
- New: docs/architecture-evolution.mdx (801 lines)
- New: docs/context-engineering.mdx (222 lines)
- New: docs/hooks-architecture.mdx (784 lines)
- New: docs/progressive-disclosure.mdx (655 lines)
- Modified: plugin/hooks/hooks.json (hook configuration)
- Modified: src/hooks/context-hook.ts (path handling)
- Modified: scripts/build-hooks.js (build support)
- Bumped version to 4.3.2 in all metadata files

Design rationale: Temporary workaround until Claude Code potentially adds ability to share messages with both user and context simultaneously.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "claude-mem",
-  "version": "4.3.1",
+  "version": "4.3.2",
   "description": "Memory compression system for Claude Code - persist context across sessions",
   "keywords": [
     "claude",