feat: add solver and view examples

[had3sgames]

Summary:

• Added a Postman collection and usage docs for all current read-only view calls.
• Added a dependency-free risk-aware solver bot reference with configurable profitability and bond-risk checks.
• Centralized BondToken loading at bond-transfer sites and confirmed no duplicate BondToken reads exist within a single function body.

Closes #140
Closes #141
Closes #142
Closes #143

Validation:

• python3 -m json.tool examples/view-calls.postman_collection.json
• python3 -m py_compile examples/risk_aware_solver_bot.py
• cargo fmt --all -- --check: not run; cargo is not installed in this environment
• cargo clippy --all-targets -- -D warnings: not run; cargo is not installed in this environment

Note:

• Resource benchmark delta for Profile and reduce redundant instance-storage reads per call #142 was not measured because the repository only contains docs/149-resource-cost-per-entrypoint.md, which states the resource-benchmarking harness has not landed yet.

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