Distinguish between Mezmo error vs no logs for specified time period

Walkthrough

The changes in the MezmoFetcher class focus on updating method return types to nullable strings, enhancing error handling, and improving robustness in managing potential null values. The method GetMezmoDataAsync now returns string?, allowing for null returns in specific error scenarios. Similar adjustments are made in related methods, with checks for empty strings replaced by checks for null. Error handling has been refined to avoid unnecessary logging when certain properties are absent in JSON responses.

Changes

File Path	Change Summary
OrcanodeMonitor/Core/MezmoFetcher.cs	- Updated `GetMezmoDataAsync` to return `string?` instead of `string`.
	- Adjusted error handling to return `null` instead of an empty string.
	- Modified `GetMezmoRecentLogAsync`, `UpdateMezmoHostsAsync`, and `UpdateMezmoViewsAsync` to handle nullable strings.
	- Refined error handling in `UpdateMezmoViewsAsync` to not log errors for missing `hosts` property.

Possibly related PRs

#161: This PR introduces new methods for Mezmo API interactions, including GetMezmoDataAsync, which is directly related to the changes made in the MezmoFetcher class regarding the handling of nullable return types.
#162: This PR modifies the GetMezmoRecentLogAsync method, which is relevant as it also deals with the Mezmo API and includes updates to the method that the main PR changes, specifically regarding return types and error handling.
#179: This PR removes Mezmo-related functionality from the Fetcher class, which is relevant as it indicates changes in the handling of Mezmo data that could impact the overall architecture and error handling in the MezmoFetcher class.

Poem

🐇 In the land of code where rabbits play,
Nullable strings brighten the day.
Errors now handled with care and delight,
Fetching data, all feels just right!
Hops of joy with each new return,
In the world of Mezmo, we happily learn! 🌼

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📥 Commits

Files that changed from the base of the PR and between acbf4d888ed9434ee39ed454eb44b1db6f1d9820 and 42bc0dc124130e21cd13e7af5251ac79c372c794.

📒 Files selected for processing (1)

* OrcanodeMonitor/Core/MezmoFetcher.cs (6 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

* OrcanodeMonitor/Core/MezmoFetcher.cs

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orcasound / orcanode-monitor