Prepare v0.25.0 release

[pjbull]

Prepares the v0.25.0 release: bumps pyproject.toml to 0.25.0 and retitles the ## UNRELEASED changelog section to ## v0.25.0 (2026-08-22), adding the entry PR #572 (presigned URLs for the cloudpathlib.local mocks) never got, plus missing PR links and ordering/wording cleanup on the sibling entries. Reconciles the hand-written docs with the entries in that section: the caching page now documents walk(lazy=True) dirnames pruning and the new CloudPathLocalPathTraversalError, the testing page documents mock presigned URLs, and the authentication page enumerates the copy-specific S3 ExtraArgs (verified against boto3.s3.transfer.S3Transfer.ALLOWED_COPY_ARGS) alongside the source-vs-destination SSE-C distinction. The only code change is a docstring: addressing_style also accepts boto3's "path" and "auto". Notebook edits are markdown-only, so no cells were re-executed; the docs/docs/script/ mirrors were regenerated with nbautoexport, which also picked up pre-existing drift in patching_builtins.py and one code cell of testing_mocked_cloudpathlib.py. No release has been tagged — that is left as a follow-up.

No issue; this is release prep.

---

Contributor checklist:

• I have read and understood CONTRIBUTING.md
• Confirmed an issue exists for the PR, and the text Closes #issue appears in the PR summary (e.g., Closes #123). — n/a, release prep
• Confirmed PR is rebased onto the latest base
• Confirmed failure before change and success after change — n/a, no behavior change
• Any generic new functionality is replicated across cloud providers if necessary — n/a
• Tested manually against live server backend for at least one provider — n/a, docs and version only
• Added tests for any new functionality — n/a, no new functionality
• Linting passes locally (make lint)
• Tests pass locally (make test: 1121 passed, 8 skipped)
• Updated HISTORY.md

Additional verification: make docs builds with no warnings or errors, and the installed package reports 0.25.0, which is what the release.yml tag-match gate checks.

🤖 Generated with Claude Code

[github-actions]

🚀 Deployed on https://deploy-preview-584--gallant-agnesi-5f7bb3.netlify.app

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.4%. Comparing base (e0b22b4) to head (6a00dd7).

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #584     +/-   ##
========================================
+ Coverage    93.7%   94.4%   +0.7%     
========================================
  Files          28      28             
  Lines        2290    2290             
========================================
+ Hits         2147    2164     +17     
+ Misses        143     126     -17     

Files with missing lines	Coverage Δ
cloudpathlib/s3/s3client.py	94.6% <ø> (ø)

... and 2 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.