#81 fix(deps): bump certifi to 2026.10.19

Why

Eight eMudhra intermediate CA private keys were confirmed compromised (article). certifi 2026.10.19 drops the emSign ECC Root CA - G3 root. requests and httpx trust certifi's bundle and do not check revocation, so the older bundle accepts certificates chaining to that root.

What

• uv.lock: certifi upgraded to 2026.10.19 (uv lock --upgrade-package certifi; no other packages changed).
• Version bumped to 0.1.2 with a CHANGELOG entry.
• No certifi floor added to pyproject.toml, so downstream installs are not constrained.

Tests: lock consistency checked locally; full suites left to CI.

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