Fix CI failure in pnpm install --frozen-lockfile due to signature verification issue

[kalasgarov]

Description:
The CI/CD pipeline is failing during the pnpm install --frozen-lockfile step with the following error:

Pipeline code:

Error: Cannot find matching keyid: {"signatures":[{"sig":"MEYCIQDbcyRXEEpUvMj22WsicmOsvx+ctqHZv1vLScf3/247EAIhANfMkRDNAHdtTDNZ34BVH2z2z0Ef8o5VK4osH6ES9RHW","keyid":"SHA256:DhQ8wR5APBvFHLF/+Tc+AYvPOdTpcIDqOhxsBHRwC7U"}],"keys":[{"expires":null,"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","keytype":"ecdsa-sha2-nistp256","scheme":"ecdsa-sha2-nistp256","key":"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE1Olb3zMAFFxXKHiIkQO5cJ3Yhl5i6UPp+IhuteBJbuHcA5UogKo0EWtlWwW6KSaKoTNEYL7JlCQiVnkhBktUgg=="}]}
    at verifySignature (/usr/lib/node_modules/corepack/dist/lib/corepack.cjs:21535:47)
    at fetchLatestStableVersion (/usr/lib/node_modules/corepack/dist/lib/corepack.cjs:21553:5)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    at async fetchLatestStableVersion2 (/usr/lib/node_modules/corepack/dist/lib/corepack.cjs:21672:14)
    at async Engine.getDefaultVersion (/usr/lib/node_modules/corepack/dist/lib/corepack.cjs:22298:23)
    at async Engine.executePackageManagerRequest (/usr/lib/node_modules/corepack/dist/lib/corepack.cjs:22396:47)
    at async Object.runMain (/usr/lib/node_modules/corepack/dist/lib/corepack.cjs:23102:5)
 Public code references from 1 repository
 1 vulnerability detected

The error occurs in the following Dockerfile line:

Dockerfile
RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile

Steps to Reproduce:
Trigger the CI/CD pipeline.

Environment:
Node.js version: v22.13.1
CI/CD platform: GitHub Actions

[kalasgarov]

PR: #480