Relax redis-py upper bound to <8.0

[abrookins]

Summary

• relax redis dependency upper bound from <7.2 to <8.0
• update uv.lock to match the new constraint

Closes #527

Validation

• ran uv lock
• ran uv run pytest (local environment has existing unrelated integration/import failures)

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Note

Low Risk
Low risk dependency constraint change; main risk is incompatibility with redis 7.x API/behavior if consumers upgrade without corresponding test coverage.

Overview
Relaxes dependency constraints by widening the redis requirement from <7.2 to <8.0 in pyproject.toml.

Lockfile updated (uv.lock) to reflect the new redis version range.

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[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}