[E4] Squad Formation Phase

[kitplummer]

Goal: Implement Phase 2 protocol for squad cohesion and leader election

Success Criteria:

• Leader election converges in <5 seconds
• Emergent capabilities discovered
• Squad ready for tasking
• Handles leader failure gracefully

Duration: Week 3-5
Dependencies: E3
Priority: P0

Stories:

• E4.1: Intra-Squad Communication
• E4.2: Leader Election Algorithm
• E4.3: Role Assignment
• E4.4: Squad Capability Aggregation
• E4.5: Phase Transition Logic

See docs/CAP-POC-Project-Plan.md for detailed story descriptions.

[kitplummer]

E4 Complete - All stories implemented and merged to main:

✅ E4.1: Intra-Squad Communication - src/squad/messaging.rs
✅ E4.2: Leader Election Algorithm - src/squad/leader_election.rs
✅ E4.3: Role Assignment - src/models/role.rs with human-machine integration
✅ E4.4: Squad Capability Aggregation - src/squad/capability_aggregation.rs
✅ E4.5: Phase Transition Logic - src/squad/coordinator.rs

Success Criteria Met:

• Leader election converges in <5 seconds ✅
• Emergent capabilities discovered ✅
• Squad ready for tasking ✅
• Handles leader failure gracefully ✅

Merged in PR #26 with comprehensive E2E tests and documentation.