fix(seismic-web3): sync runtime package version

[Kewe63]

Fixes #301

Summary

• update the public seismic_web3.__version__ value from 0.2.2 to the package's released 0.3.0 version
• replace the hard-coded version assertion with a comparison against installed distribution metadata
• make future package-version drift fail the Python test suite

Root cause

The 0.3.0 release bump updated pyproject.toml and uv.lock, but left the public module constant and its test at 0.2.2. Because the test asserted the stale literal, it continued to pass instead of detecting the mismatch.

Tests

• Pre-fix regression: test_module_version_matches_distribution_metadata failed with 0.2.2 != 0.3.0
• Post-fix regression: the focused test passed
• make ci: Ruff format/check, ty, and 290 non-integration tests passed
• Python 3.10, 3.11, and 3.12: the focused metadata-equality test passed on each version
• Built wheel seismic_web3-0.3.0-py3-none-any.whl: runtime constant and wheel metadata both report 0.3.0

Compatibility

The change is limited to the public version constant and its existing version test. Pairwise three-way merges with open PRs #296, #298, and #300 are conflict-free.