Remove unused runtime dependencies

[mpelteshki]

Summary

• Remove unused direct runtime dependencies from setup.py and requirements.txt.
• Keep test-only pytest available through requirements_dev.txt.
• Leave compatibility and provider dependencies untouched.

Removed direct runtime entries:

• alpha_vantage
• quandl
• bcrypt
• pytest
• psycopg2-binary
• exchange_calendars
• holidays
• psutil
• Flask

Size estimate

Resolver comparison after this change drops 7 packages from clean runtime installs:

• alpha-vantage
• quandl
• bcrypt
• psycopg2-binary
• holidays
• inflection
• more-itertools

pytest, Flask, psutil, and exchange_calendars still resolve transitively from remaining dependencies, so net savings are smaller than the direct dependency list.

Estimated savings:

• Linux cp312 x86_64 wheels: ~5.91 MiB download, ~16.35 MiB unzipped wheel payload.
• Local macOS Python 3.14 target install: ~5.7 MiB wheel downloads, ~22 MiB installed site-packages footprint.

Largest saved package is psycopg2-binary: ~4.08 MiB wheel / ~11.12 MiB unzipped on Linux cp312 x86_64.

Validation

• git diff --check
• python -m pip install --dry-run --break-system-packages --ignore-installed -r requirements.txt
• temporary venv: python setup.py egg_info

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/remove-unused-runtime-deps

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