[EventHubs] Replacing scaling logs to WebJobs extension methods

[alrod]

Summary

Replace direct LogWarning calls in the EventHubs scaling extensions with standardized LogFunctionScaleWarning WebJobs extension method.

This enables the Scale Controller's OpenTelemetry logger to intercept scaling warning events (EventId 8003) and forward them to the customer's Application Insights, providing visibility into connectivity errors during scaling.

Changes

• EventHubMetricsProvider.cs: Replaced LogWarning with LogFunctionScaleWarning for partition info and checkpoint error logging
• CHANGELOG.md: Added entry under Other Changes

Phase 2 (follow-up)

Migrating the LogInformation scale vote detail logs to LogFunctionScaleVote will follow once azure-webjobs-sdk #3189 ships (changes vote log level from Debug to Information).

Context

Part of the Scale Controller App Insights logging feature (AAPT-Antares-ScaleController PR #14140160).

Related PRs:

• #53923 - Storage Queue extension
• #53926 - ServiceBus extension
• #975 - CosmosDB extension

[Copilot]

Pull Request Overview

This PR replaces custom scaling logs with WebJobs extension methods to standardize logging for EventHubs scaling operations.

• Refactored logging in EventHubsTargetScaler to use LogFunctionScaleVote extension method
• Updated error logging in EventHubMetricsProvider to use LogFunctionScaleError extension method
• Removed redundant try-catch blocks that were previously used only for logging warnings
• Updated Microsoft.Azure.WebJobs package dependencies to version 3.0.42-dev to enable the new logging extension methods

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
EventHubsTargetScaler.cs	Consolidated two separate log statements into a single LogFunctionScaleVote call with concatenated details string
EventHubMetricsProvider.cs	Replaced LogWarning with LogFunctionScaleError and removed try-catch blocks that only logged warnings without handling exceptions
Packages.Data.props	Updated Microsoft.Azure.WebJobs packages to version 3.0.42-dev to support new logging extension methods
NuGet.Config	Added local package source for development/testing purposes

[github-actions]

Hi @alrod. Thank you for your interest in helping to improve the Azure SDK experience and for your contribution. We've noticed that there hasn't been recent engagement on this pull request. If this is still an active work stream, please let us know by pushing some changes or leaving a comment. Otherwise, we'll close this out in 7 days.

[github-actions]

Hi @alrod. Thank you for your contribution. Since there hasn't been recent engagement, we're going to close this out. Feel free to respond with a comment containing /reopen if you'd like to continue working on these changes. Please be sure to use the command to reopen or remove the no-recent-activity label; otherwise, this is likely to be closed again with the next cleanup pass.

[alrod]

/reopen