chore(release): v0.39.0

[fclairamb]

🤖 I have created a release beep boop

0.39.0 (2026-10-18)

Features

• A2A notification channel for AI agents (#596) (2f55dc3)
• dash0: calmer, flatter and phone-friendly dashboard UI (#582) (ce933cc)
• vendor status check, SMS/voice quotas, upgrade-path CI and flaky test fixes (#591) (1a392ec)

Bug Fixes

• checks: build the postgres check connection from an explicit pq.Config (#584) (a4b394a)
• deps: update github.com/dop251/goja digest to 313b6b6 (#578) (d068c02)
• deps: update github.com/dop251/goja digest to d42f16b (#597) (3f501a1)
• deps: update github.com/dop251/goja digest to e686264 (#590) (380ed48)
• deps: update module github.com/knadh/koanf/v2 to v2.4.0 (#586) (c02a042)
• deps: update module github.com/knadh/koanf/v2 to v2.4.1 (#594) (95e8ec3)
• deps: update module github.com/posthog/posthog-go to v1.35.1 (#583) (efb4819)
• deps: update module golang.org/x/mod to v0.42.0 (#598) (62e913d)
• showcase: film a single region, as a plain docker run shows (#595) (a443442)

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[fclairamb]

🤖 Created releases:

• v0.39.0

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