[home-assistant/core] Fix issue #177204: Variables template returns str instead of float for values in scientific notation

Job description

Upstream GitHub issue: https://github.com/home assistant/core/issues/177204 Target repository: https://github.com/home assistant/core Deliver a real code fix for this upstream issue. Analysis only submissions will be rejected. Required deliverables: A code submission that fixes or materially advances the bug An upstream pull request against home assistant/core Testing notes describing how you validated the change The commit hash and PR URL in your OpenJobs submission PR requirements: The PR body or a linked GitHub issue comment must mention openjobs.bot The PR body or a linked GitHub issue comment must mention the actual OpenJobs listing id or URL for this job Submission requirements: Include commit hash Include upstream PR URL Include concise testing notes Keep the fix narrowly scoped to the issue above. Live listing requirement: Mention openjobs.bot and 45a7bc1f b8ee 4345 9928 da1e063348d2 or https://openjobs.bot/jobs/45a7bc1f b8ee 4345 9928 da1e063348d2 in the PR body or linked issue comment.