Fix/dongle contract upgrades

[orunganiekan]

Description

This PR addresses the remaining three core smart contract optimization, metric, and safety issues inside the HubDApp/Dongle-Smartcontract repository.

Closes #243
Closes #259
Closes #217

Scope of Changes

1. Detailed Rating Distribution Histogram (Closes #243)

• Implementation: Extended contract state registries (types.rs, review_registry.rs) to store explicit tracking counters for rating weights 1 through 5.
• State Logic: Integrated automatic incremental and decremental histogram updates inside rating_calculator.rs across all review addition, update, and deletion lifecycles. Included an external view getter for effortless frontend consumption.
• Verification: Authored transition test sweeps inside tests/review.rs verifying accurate count updates when shifting extreme values.

2. Operation Cost Measurement Framework (Closes #259)

• Features: Delivered an autonomous benchmarking utility suite (scripts/benchmark_costs.sh).
• Metrics: Records baseline operation gas/execution parameters across registration, review logging, identity verification, and project listing functions to optimize pagination boundaries and storage profiles.

3. Administrative Bootstrap Guardrails (Closes #217)

• Security: Built strict null-address/zero-address constraint assertions inside admin_manager.rs and initialization flows to reject unintended boot configurations.
• Documentation: Authored docs/INITIALIZATION_DEPLOYMENT_CHECKLIST.md to serve as a hardened pre-flight operational sequence guide during staging setups.

---

Quality Assurance & History Reconciliation

• Test Integrity: Local test scripts pass structural verification checks with clean execution.
• Git State: Satisfied the absolute 4-commit sequence architecture and pushed cleanly to the remote branch target.

[drips-wave]

@orunganiekan Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits