v0.9.0

What's Changed

• Enforce data retention per plan (7/30/90 days) with a daily purge by @BN-KR in #288
• Rebuild welcome and no-trace emails with dithered art by @BN-KR in #290
• Make Slack and webhook alerts clear and tested by @BN-KR in #289
• Open traces on the failing step; land on Tracing after sign-in by @BN-KR in #291
• Plan caps with 10% buffer and usage meter in account settings by @BN-KR in #292
• Promote staging to main (#288–#292) by @BN-KR in #293
• Send welcome email to every new sign-up, locked to the signed-in user by @BN-KR in #294
• Promote staging to main (#294 welcome email lock) by @BN-KR in #295

Full Changelog: v0.8.0...v0.9.0