chore(deps): bump aiohttp to 3.12.14; harden HTTP client

[DivInstance]

Summary

• Bump aiohttp to 3.12.14.
• Replace deprecated verify_ssl with ssl flag.
• Add default timeout and env configuration (HTTP_TIMEOUT, HTTP_SSL_VERIFY).
• Add raise_for_status and basic retry logic for robustness.

Motivation

Ensures compatibility with aiohttp 3.12.x, improves reliability under transient network conditions, and makes HTTP client behavior configurable via environment.

Changes

• pyproject.toml: aiohttp==3.12.14
• app/apis/requests.py: timeout, SSL toggle, retries, raise_for_status
• sample.env: HTTP_TIMEOUT, HTTP_SSL_VERIFY

Testing

• Verified linting via pre-commit.
• Sanity-checked request path under both SSL modes and different timeouts.

Notes

No breaking API change in project surface; behavior is more robust by default.