Remove unused deepdiff dependency

[tmilnthorp]

Follow-up to #2673.

What

deepdiff is declared in [project].dependencies but is never imported anywhere in the AppDaemon codebase — I grepped the whole tree (including dynamic import_module/__import__/string references) and there are zero hits outside pyproject.toml, uv.lock, the Dockerfile comment, and old HISTORY.md changelog lines.

This removes it, along with its now-orphaned orderly-set transitive (nothing else depends on it), and adds a HISTORY.md entry.

Why

Beyond trimming an unused package: deepdiff periodically draws security advisories (e.g. the 8.6.1/8.6.2 DoS fixes), which forces downstream packagers to chase versions of a dependency AppDaemon doesn't actually use. Dropping it removes that noise entirely.

Notes for the reviewer

• uv.lock was edited minimally on purpose. Running the pinned uv-lock pre-commit hook (uv 0.9.26) regenerates the whole file — it migrates the lock format (revision = 1 → 3, adds upload-time to every entry), which turns this into a ~3.7k-line diff unrelated to deepdiff. To keep the change reviewable I removed only the deepdiff/orderly-set entries and left the rest (and revision = 1) untouched. Happy to instead run the full regeneration if you'd prefer the format migration to ride along.
• Dockerfile left alone (possible follow-up). The ARM build installs git rust cargo with the comment "build the orjson package (required by deepdiff)" — but deepdiff 9.x no longer pulls orjson (it's not in the lock at all), so that step already appears dead. I left it out of this PR since I can't test the multi-arch image build locally; flagging it in case you'd like it cleaned up too.

Testing

pyproject.toml and uv.lock both still parse; the end-of-file, trailing-whitespace, ruff-check, and codespell pre-commit hooks pass on the changed files. No code imports deepdiff, so nothing at runtime depends on it.