Refactor: Extract shared helper for DocumentCreated event publishing in ResourceIndexItemProcessor

[coderabbitai]

Context

This issue tracks a refactoring opportunity identified during PR #97 review.

File: src/SportsData.Provider/Application/Processors/ResourceIndexItemProcessor.cs

Problem

The logic for building and publishing DocumentCreated events is duplicated across three methods:

• PublishDocumentCreatedAsync (lines 311-346)
• HandleNewDocumentAsync (lines 227-255)
• HandleUpdatedDocumentAsync (lines 279-308)

Each method repeats:

• baseUrl + providerRef construction
• GetIncludableJson call
• DocumentCreated instantiation with identical parameters
• _publisher.Publish invocation
• Follow-up log message

This duplication creates a maintenance burden—any change to the event construction (e.g., adding a field) must be applied in three places.

Proposed Solution

Extract a single shared helper method that:

1. Takes the JSON source string and a log suffix as parameters
2. Centralizes the baseUrl/providerRef construction
3. Handles the DocumentCreated event instantiation
4. Publishes the event
5. Logs the completion

Then update the three existing methods to call this shared helper.

References

• PR: enable use of mongo for doc cache #97
• Discussion: enable use of mongo for doc cache #97 (comment)
• Requested by: @jrandallsexton