Add a contract entrypoint returning an investor's stacked-insurance coverage breakdown per policy

[Baskarayelu]

📋 Description

investment.rs tracks insurance policies and exposes total_active_coverage_percentage and has_active_insurance, but there is no read returning a per-policy breakdown (provider, coverage bps, premium, active flag) for a given investment. Clients can only see the aggregate.

Why this matters: when coverage is stacked across providers, users need to see the constituent policies — who covers what and at what premium. A per-policy breakdown read makes stacked insurance transparent. Read-only and self-contained.

🎯 Requirements & Context

• Add get_insurance_breakdown(env, investment_id) -> Vec<(Address, u32, i128, bool)> (provider, coverage_bps, premium, active).
• Return an empty vec for investments with no insurance.
• Derive from the stored policies; do not change total_active_coverage_percentage.
• Add /// doc comments.

Context & constraints

• SDK 25.1.1. Pure read; no auth. Reuse get_investment.

🛠️ Suggested Execution

git checkout -b feature/insurance-breakdown-query
cargo test -p quicklendx-contracts insurance_breakdown -- --nocapture
cargo clippy -p quicklendx-contracts --all-targets -- -D warnings

• Edge cases: no policies (empty); single policy; multiple stacked policies (order stable); claimed/inactive policy flagged.

Example commit message

feat(insurance): add per-policy get_insurance_breakdown read

Surfaces provider/coverage/premium/active per policy so stacked coverage is
transparent.

✅ Acceptance Criteria & Guidelines

Requirement	Target
Per-policy breakdown from stored data	Required
Empty vec for no insurance	Required
Test coverage	≥ 95%
cargo clippy clean	Required
Timeframe	96 hours from assignment

💬 Community & Support

Join Discord: https://discord.gg/VpngvTjWa — comment to claim. 🚀

[abufauzahn]

Hi! I've carefully reviewed the entire task description and fully understand the requirements and expected outcome.
I have experience working on similar tasks and I'm confident I can complete this within about an hour. I'd be happy to take ownership of this issue and submit a clean, well-tested solution promptly.
If it's available, please assign it to me. Thank you!