[WIP] Implement Product Aggregate Rating Calculation

[HermanL0201]

Implement Product Aggregate Rating Calculation

Description

Task

Create a method to calculate and return average product rating

Acceptance Criteria

• Aggregate rating method must return a number between 0 and 5
• Method should work with varying numbers of reviews
• Calculation must be performant and use MongoDB aggregation
• Handle edge cases like no reviews gracefully
• Provide accurate average rating rounded to 2 decimal places

Summary of Work

This pull request adds functionality to calculate and return the average product rating using MongoDB aggregation. The implementation will provide a reliable method to compute product ratings based on user reviews.

Changes Made

• Add aggregate rating calculation method in product review service
• Implement MongoDB aggregation pipeline for rating calculation
• Create type definitions for rating aggregation result
• Add error handling for rating calculation
• Ensure calculation handles cases with no reviews

Tests

• Verify aggregate rating calculation returns correct average
• Test rating calculation with multiple reviews
• Validate handling of products with no reviews
• Check rounding and precision of calculated rating
• Ensure performance of aggregation method

Signatures

Staking Key

DZwmqbbKALnQYMhTLYdYeBBKVNptDMSAKQjaASJ9btgo: 2fRDvW2KFKBXKarLqoFhquECoGJyEhEbAFM4kqCBgWAmhKwW68D6vMAPo9y5bGpWbaPcGMMhxuKr6sVYWXiGKqcx2Fjc5bj9U9kUGV7Grwfrv9itEPus8qgrF8TYNTvFZ7gvpq3wW3SmDq83MLfXzqFDByZZJtpvbEfd3PW42JjWJC4CfwoKK9oFfbaFkHE44KEAV7HcQFcxq4qD8uycKrL2wK8tkWfWx6ijozEcZ2h6JDCnnFnvDY2T9n9DEXwYKprMFz68dWerA4ebRvLxCLjoNat5fF4hTQqsyEwoeF8fCpQHPJDUhpAzzGx598ATjJTZnkfuYMQQMvW3NyiEVqnQjuzpGCbn2LwXNE57kn5zur4W7u5t1Qgx6n7st3B1GuknTSXZXfJDSEAUbqXp4jTQJHBKV9DMYS2g

Public Key

4E3nQUGBiknkTFLJE6Htj3KKNnHzpxhNv2Jw5cvW4s7J: 2k91oGNVZD3h9VeEDhBu4B8HPwQyEuUHHWvV31nN4S7d46T9GibxJab2AbrHecRXBBN97bDmMWutUP31Cc66x2Gvb9KKiuKK9wyoQYoTbvKb9WVwe3ox6dxzubNF1S1WXiE3pvrra5FUparrjj3epnq4FpySdCbAKEg3JLf1BVXNFKbLZ2gD2Hf6ojLHGB13QSMpxj9x3vjbvpHYSJR5p7hhYswAyoSD4u9NhAQ258YFov7i3AqNpZoL9UEyEZ3ousPjkogi6nA1dGvfC3s1tfpvfSGQ8rzBJfCaG7Jyi3i7HGsY6cUrHcKs7R1tZj9mXvaPvjJfY2D89K9YWPSMG1CKyL4YvGeqiwtmMhXcy3LbCP3QJE9jNikRrWViDrWC2vxzSudk4v4VkxUyUBcDBVVahMQm6ma4gyvt