chore: pin oilpriceapi-mcp 3.4.0

[karlwaldman]

Pins oilpriceapi-mcp to 3.4.0 everywhere the extension names it: gemini-extension.json (the launch args), package.json + package-lock.json, GEMINI.md, README.md (4 commands), and tests/manifest.test.mjs.

Why

3.4.0 was published today to npm (with provenance) and the MCP registry, verified by registry readback. It carries fourteen fixes since 3.3.0 — the ones a Gemini user would notice:

• currency rendered as the API reported it (e.g. GBp pence no longer shown as pounds, 100× too high)
• opa_get_rig_counts no longer renders undefined for every field
• a partial answer is no longer presented as complete; an absent field is never printed as data
• the static 19-code catalogue fallback that masked 401/404/5xx is gone

Tool inventory

The read-scope inventory is unchanged at 32 — Gemini manifest launches the exact read-only tool inventory passes without edits, so no new tool entered the Gemini surface and the count comment in protocol.test.mjs (which records the 3.0.0 → 3.3.0 change) still describes the last change.

Verification (local, this branch)

• node_modules/oilpriceapi-mcp/package.json → 3.4.0, lockfile resolves oilpriceapi-mcp-3.4.0.tgz
• npm test → 11 passed, 0 failed (manifest, protocol, auth/locked/rate-limit recovery, malformed upstream, timeout bound, no secret leakage in child stderr)

🤖 Generated with Claude Code

https://claude.ai/code/session_015ao5paex73xXvuM424Libo

[coderabbitai]

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