chore(preview-v3): release 3.0.0-beta.4

[github-actions]

🤖 I have created a release beep boop

3.0.0-beta.4 (2026-06-29)

⚠ BREAKING CHANGES

• client_side_availability, defaults, default_client_side_availability, and fallthrough now use object syntax (attr = {...}) instead of a single-element list (attr = [{...}]).

Features

• autogen: add stage-1.5 triage workflow for unclaimed operations (#474) (32a91d0)
• scaffold launchdarkly_ai_agent_graph resource (autogen stage 2) (#475) (8daf542)
• use object syntax for single-object flag/project attributes (REL-14237) (#480) (821d574)

Bug Fixes

• driftreport: repair mapping.yaml so the drift report parses (#473) (4bc9db7)
• lint: lowercase capitalized error strings in team_member_helper (ST1005) (#477) (a3725e4)

---

This PR was generated with Release Please. See documentation.

---

Note

Low Risk
The PR only updates version metadata and changelog text; runtime behavior changes are already merged on the preview-v3 line.

Overview
Bumps the preview-v3 canary version from 3.0.0-beta.3 to 3.0.0-beta.4 via Release Please (.release-please-manifest-canary-v3.json) and adds the matching CHANGELOG.md section for that tag.

The release notes document what landed since beta.3—notably a breaking Terraform schema change: client_side_availability, defaults, default_client_side_availability, and fallthrough must use object syntax (attr = { ... }) instead of a single-element list. Also noted are autogen pipeline work (stage-1.5 triage, launchdarkly_ai_agent_graph scaffold), drift-report mapping.yaml fix, and a small lint fix in team_member_helper.

^{Reviewed by Cursor Bugbot for commit 4317ce9. Bugbot is set up for automated code reviews on this repo. Configure here.}