feat(attributes): Add starlette.middleware_name (deprecated) in favor of middleware.name

[sentrivana]

Summary

• Adds starlette.middleware_name as a deprecated attribute with middleware.name as its replacement
• Adds starlette.middleware_name as an alias on middleware.name

Test plan

• yarn test passes (7592 JS tests + 3 Python tests)
• yarn run generate ran successfully

🤖 Generated with Claude Code

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

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New Features ✨

Attributes

• Add starlette.middleware_name (deprecated) in favor of middleware.name by sentrivana in #485

• 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

Internal Changes 🔧

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

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