chore: replace presidio@microsoft.com with presidio@dataprivacystack.org in PyPI metadata

[Copilot]

All six pyproject.toml files across the monorepo carried presidio@microsoft.com as the published PyPI author email. This replaces that address with presidio@dataprivacystack.org in every package's metadata.

Changes

• presidio/pyproject.toml
• presidio-analyzer/pyproject.toml
• presidio-anonymizer/pyproject.toml
• presidio-cli/pyproject.toml
• presidio-image-redactor/pyproject.toml
• presidio-structured/pyproject.toml

Each file had the same single-line change:

# before
authors = [{name = "Presidio", email = "presidio@microsoft.com"}]

# after
authors = [{name = "Presidio", email = "presidio@dataprivacystack.org"}]

No setup.py, setup.cfg, or other packaging metadata files contained Microsoft-domain emails. Documentation, samples, Azure links, and unrelated content are untouched.