chore(main): release LaunchDarkly.ServerSdk.Ai 0.13.0

[github-actions]

🤖 I have created a release beep boop

0.13.0 (2026-07-20)

⚠ BREAKING CHANGES

• ILdAiConfigTracker.TrackDuration now takes a double instead of a float — custom ILdAiConfigTracker implementations must update their TrackDuration override signature

Features

• Extend AiMetrics with optional ToolCalls and DurationMs (duration override) (2e307c9)
• Extend MetricSummary with accumulated ToolCalls and ResumptionToken (2e307c9)
• ILdAiConfigTracker.TrackDuration now takes a double instead of a float — custom ILdAiConfigTracker implementations must update their TrackDuration override signature (2e307c9)
• TrackMetricsOf auto-tracks tool calls, honors DurationMs override, and aligns operation-vs-extractor failure semantics with the other SDKs (2e307c9)

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Note

Low Risk
This PR only updates version metadata and changelog; the breaking tracker API change ships in the tagged release, not as new code in this diff.

Overview
Release Please bumps LaunchDarkly.ServerSdk.Ai from 0.12.0 to 0.13.0 across the release manifest, .csproj, SdkInfo, provenance docs, and a new CHANGELOG section.

The release notes document 0.13.0 behavior (already merged elsewhere): optional ToolCalls and DurationMs on AiMetrics, ToolCalls and ResumptionToken on MetricSummary, TrackMetricsOf auto-tracking tool calls and honoring duration overrides, and a breaking change where ILdAiConfigTracker.TrackDuration takes double instead of float (custom tracker implementations must update overrides).

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