feat(attributes): Add server_name (deprecated) and sentry.metric.source

[cleptric]

Add server_name as a deprecated attribute pointing to server.address as the OTel-aligned replacement, following the same pattern as other recent deprecations (faas.id → cloud.resource_id, faas.execution → faas.invocation_id). The server.address alias list is updated to include server_name.

Also adds the new sentry.metric.source attribute.

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

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New Features ✨

Attributes

• Add server_name (deprecated) and sentry.metric.source by cleptric in #477

• Add sentry.metric.source by klochek in #476
• Add faas.id (deprecated) in favor of cloud.resource_id by andreiborza in #475
• Add faas.execution (deprecated) in favor of faas.invocation_id by andreiborza in #473
• Add messaging attributes by s1gr1d in #469
• Add url.same_origin (deprecated) and http.request.same_origin (replacement) attributes by Lms24 in #456
• Add db.response.status_code by s1gr1d in #462

Other

• (ai) Add granular cost attributes for cache and reasoning by vgrozdanic in #461
• (js) Add _BASE attribute key exports for dynamic attribute keys by Lms24 in #471

Internal Changes 🔧

• (ci) Stop inheriting secrets for changelog-preview by tobias-wilfert in #463

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