feat(ai): complete Phase 2/3 documentation and memory system improvements

Phase completion and enhancement updates:

## Documentation Added
- Phase 2 completion: Memory system implementation details
- Phase 3 completion: Research capabilities and tool integration
- Session documentation: Model testing, VRAM optimization analysis
- Test results: Comprehensive prompt testing (v1_verbose: 87/100)
- Tool logging implementation guide

## System Prompts
- Added prompts.py with 7 tested variants for A/B testing
- v1_verbose, v2_concise, v3_imperative, v4_minimal, etc.
- Comprehensive testing results for each variant
- Production-ready prompt selection guidance

## Memory System Enhancements
- Multi-tenancy support: Added user_id parameter throughout
- System message filtering: Don't store system messages in history
- Improved conversation turn tracking with user isolation
- Enhanced memory manager for better multi-user support

## AI Controller Improvements
- Better memory integration with user_id support
- Enhanced error handling for memory operations
- Improved token tracking for usage monitoring
- Skip system message storage (part of agent state)

## Portainer Client
- Comprehensive API client (148 lines)
- Stack management and service monitoring
- Container operations with full error handling
- Async support for all operations

## Architecture Documentation
- Updated agent flow diagrams for ADK architecture
- Enhanced core-api README with current setup
- Updated Docker compose stack configuration
- Complete testing and validation documentation

CHANGELOG.md

@@ -15,6 +15,52 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Authentik SSO Milestones 4-5: Protect remaining services (deferred)
 - Disaster recovery and offsite backup strategy
 
+## [0.10.1-phase-completion] - 2025-11-26
+
+### Added
+- **Phase 2/3 Completion Documentation**
+  - Added phase2-memory-system-complete.md with full implementation details
+  - Added phase3-multi-agent-workflows-complete.md documenting research capabilities
+  - Added system prompts file (prompts.py) with 7 tested variants for A/B testing
+  - Session documentation for model testing and VRAM optimization
+- **Test Results & Analysis**
+  - Comprehensive prompt testing results (87/100 score for v1_verbose)
+  - Model comparison testing (Mistral, Gemma, tool calling validation)
+  - Tool logging implementation documentation
+  - Verified test results for production readiness
+- **Portainer Client Enhancements**
+  - Added comprehensive Portainer API client (148 lines)
+  - Stack management, service monitoring, container operations
+  - Full error handling and async support
+
+### Changed
+- **Memory System Improvements**
+  - Added user_id parameter for multi-tenancy support
+  - Skip storing system messages (part of agent state_modifier)
+  - Enhanced memory manager with better user isolation
+  - Improved conversation turn tracking
+- **AI Controller Enhancements**
+  - Better memory integration with user_id support
+  - Improved error handling for memory operations
+  - Enhanced token tracking for usage monitoring
+- **Architecture Documentation**
+  - Updated agent flow diagrams to reflect ADK architecture
+  - Enhanced core-api README with current setup
+  - Updated Docker compose stack configuration
+
+### Technical Details
+- **Files Added:**
+  - `services/core-api/src/agent/prompts.py` - 7 system prompt variants
+  - `plans/completed/phase2-memory-system-complete.md`
+  - `plans/completed/phase3-multi-agent-workflows-complete.md`
+  - `services/core-api/COMPREHENSIVE_PROMPT_TEST_RESULTS.md`
+  - `services/core-api/TOOL_LOGGING_IMPLEMENTATION.md`
+  - `docs/sessions/2025-11-24-*.md` - Model testing documentation
+- **Memory System:**
+  - Multi-tenancy support with user_id throughout
+  - System message filtering (not stored in history)
+  - Improved conversation metadata tracking
+
 ## [0.10.0-adk-migration] - 2025-11-26
 
 ### Added