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

[github-actions]

🤖 I have created a release beep boop

0.13.0 (2026-08-17)

⚠ 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)
• server-ai: stamp modelKey and modelVersion on AI usage events (… (#308) (9daa47a)
• TrackMetricsOf auto-tracks tool calls, honors DurationMs override, and aligns operation-vs-extractor failure semantics with the other SDKs (2e307c9)

---

This PR was generated with Release Please. See documentation.

---

Note

Overview
Release-only PR: bumps LaunchDarkly.ServerSdk.Ai from 0.12.0 to 0.13.0 in the manifest, csproj, SdkInfo, provenance docs, and adds the 0.13.0 changelog entry. No library source files change in this diff.

The published 0.13.0 package (already on main via prior commits) extends AI metrics and tracking: optional ToolCalls and DurationMs on AiMetrics, richer MetricSummary (tool calls + resumption token), modelKey/modelVersion on usage events, and TrackMetricsOf behavior aligned with other SDKs (auto tool-call tracking, duration override, failure semantics).

Breaking: custom ILdAiConfigTracker implementations must change TrackDuration from float to double.

^{Reviewed by Cursor Bugbot for commit da274bd. Bugbot is set up for automated code reviews on this repo. Configure here.}