feat: Coordinator diagnostic breadcrumbs as OTel span attributes

[diberry]

Problem

When spawns fail, there is no record of the system state at spawn time. The existing OTel stack has agent spawn spans but no context-size attributes.

From

Telemetry + Procedures reviews of #21. Phase 3 in revised plan.

Proposed

Add captureSpawnContext() function (separate from runDoctor()) that records as span attributes on squad.lifecycle.spawnAgent:

• decisions_md_bytes: decisions.md size
• charter_bytes: agent charter size
• history_bytes: agent history size
• context_tokens_actual: from model response usage field
• context_utilization_pct: actual / model window
• spawn_model: resolved model name
• routing_rationale: why this agent was chosen

NOT markdown in orchestration logs — structured OTel attributes.

Owner

Telemetry (Observability) + EECOM (Core Dev)

[github-actions]

🏗️ Squad Triage — Flight (Lead)

Issue: #32 — feat: Coordinator diagnostic breadcrumbs as OTel span attributes
Assigned to: Flight (Lead)
Reason: No specific domain match — assigned to Lead for further analysis

@copilot evaluation: No strong capability match — routed to squad member.

Team roster:

• Flight (Lead) → label: squad:flight
• Procedures (Prompt Engineer) → label: squad:procedures
• EECOM (Core Dev) → label: squad:eecom
• FIDO (Quality Owner) → label: squad:fido
• PAO (DevRel) → label: squad:pao
• CAPCOM (SDK Expert) → label: squad:capcom
• CONTROL (TypeScript Engineer) → label: squad:control
• Surgeon (Release Manager) → label: squad:surgeon
• Booster (CI/CD Engineer) → label: squad:booster
• GNC (Node.js Runtime) → label: squad:gnc
• Network (Distribution) → label: squad:network
• RETRO (Security) → label: squad:retro
• INCO (CLI UX & Visual Design) → label: squad:inco
• GUIDO (VS Code Extension) → label: squad:guido
• Telemetry (Aspire & Observability) → label: squad:telemetry
• VOX (REPL & Interactive Shell) → label: squad:vox
• DSKY (TUI Engineer) → label: squad:dsky
• Sims (E2E Test Engineer) → label: squad:sims
• Handbook (SDK Usability) → label: squad:handbook
• Ralph (Work Monitor) → label: squad:ralph
• @copilot (Coding Agent) → label: squad:copilot

To reassign, remove the current squad:* label and add the correct one.

[diberry]

Closing: work completed upstream or no longer relevant. See diberry/project-dina#22 cleanup audit.