v0.4.44

What's Changed

• feat: Persist Studio manual edits via manifest by @vanceingalls in #593
• fix: make caption overrides refresh-safe by @vanceingalls in #609
• feat(cli): add remove-background command for transparent video by @jrusso1020 in #612
• feat(core,cli,engine,producer): getVariables() helper + --variables render flag (PR 1/4) by @jrusso1020 in #600
• feat(core): scope getVariables() per sub-comp instance (PR 2/4) by @jrusso1020 in #601
• feat(core,cli): variable schema validation + lint rules (PR 3/4) by @jrusso1020 in #602
• docs(skills): document variables system in SKILL.md + docs (PR 4/4) by @jrusso1020 in #603
• test(producer): add variables-prod regression for the variables stack (PR 5/5) by @jrusso1020 in #604
• fix: handle player loop and render exit by @miguel-heygen in #617

Full Changelog: v0.4.43...v0.4.44