Add session context compression before handoff to reduce token usage

[Manavarya09]

Feature Request

Problem

When handing off session context to another agent, the full context is passed which can be token-heavy and expensive.

Proposed Solution

Integrate a context compression step before handoff:

• Summarize conversation history
• Strip redundant tool outputs
• Keep only relevant code context

Could potentially integrate with TokenForge for this compression step.

Benefits

• Lower token costs on fallback agents
• Faster handoff times
• Better context quality (less noise)

[Manavarya09]

Shipped in PR #53 — scoring engine compresses context with budget allocation.