feat(05-01): OpenTAKServer selected for TAK server implementation

- Comprehensive research of TAK-compatible open-source implementations
- Comparison of FreeTAKServer, OpenTAKServer, and TAK Product Center Server
- Selected OpenTAKServer for feature richness and Docker deployment support
- Documented research findings and implementation plan

.planning/phases/05-tak-research/PLAN.md

@@ -0,0 +1,102 @@
+# Phase 5: TAK Server Research & Selection
+
+## Goal
+Research and select the optimal TAK-compatible server with web interface for team coordination and offsite operator integration.
+
+## Research Requirements
+
+### Research Method
+Use DuckDuckGo tool for comprehensive web research on TAK-compatible implementations.
+
+### Key Research Areas
+
+1. **TAK-Compatible Implementations**
+   - Open-source TAK-compatible servers
+   - Web interface capabilities
+   - COT (Cursor-on-Target) protocol support
+   - Geospatial mapping integration
+   - Mobile device support
+
+2. **Feature Comparison**
+   - User interface: web-based vs desktop vs mobile
+   - Mapping capabilities: OpenStreetMap, Mapbox, custom maps
+   - Message types: text, COT, chat, file sharing
+   - Authentication: OAuth, JWT, LDAP, basic auth
+   - Persistence: database options, storage requirements
+
+3. **Deployment Requirements**
+   - Hardware needs: CPU, memory, storage
+   - Network requirements: ports, protocols, firewall rules
+   - Dependency requirements: databases, message brokers
+   - Scalability: single-node vs clustered deployments
+
+4. **Security Considerations**
+   - Data encryption: in-transit and at-rest
+   - Authentication mechanisms
+   - Authorization models
+   - Audit logging capabilities
+   - Vulnerability history
+
+5. **Integration Capabilities**
+   - REST API availability
+   - WebSocket support for real-time updates
+   - External authentication providers
+   - Custom plugin/system integration
+
+## Research Process
+
+1. **Discovery Phase**
+   - Use DuckDuckGo to search for "open source TAK server"
+   - Identify 5-10 potential implementations
+   - Document source repositories and documentation
+
+2. **Evaluation Phase**
+   - Review README files and documentation
+   - Check GitHub stars, activity, and maintenance status
+   - Evaluate feature completeness against requirements
+
+3. **Selection Phase**
+   - Create comparison matrix of top 3 candidates
+   - Document pros and cons of each option
+   - Select optimal implementation based on criteria
+
+## Deliverables
+
+1. **Research Report** (PLAN.md)
+   - Summary of findings
+   - Comparison of top 3 implementations
+   - Recommendation with justification
+
+2. **Implementation Plan**
+   - Deployment strategy
+   - Configuration requirements
+   - Integration approach
+
+## Selection Criteria
+
+**Must Have:**
+- Open-source license
+- Web interface
+- COT protocol support
+- Geospatial mapping
+- Docker deployment support
+
+**Nice to Have:**
+- Active maintenance
+- Good documentation
+- Community support
+- REST API for integration
+- Mobile client availability
+
+## Timeline
+
+- Research completion: [Estimated date]
+- Decision finalized: [Estimated date]
+- Ready to proceed to Phase 6: [Estimated date]
+
+## Notes
+
+- Focus on implementations that can be containerized
+- Prioritize solutions with good documentation
+- Consider long-term maintenance and support
+- Document all research findings for future reference