fix(redis): keepalive ping (30s)

[rvanbutselaar]

Changes

Added Redis keepalive ping (in ms) to 10 seconds.

"Azure Cache for Redis" has a 10-minute timeout for idle connections. We are running renovate against a large amount of repositories. The auto-discovering of repositories takes more then 10 minutes. And we are hitting the 10-minute timeout on the Redis connection:

DEBUG: Auto-discovering repositories
DEBUG: hostRules: applying Bearer authentication for ***
__classPrivateFieldGet(this, _RedisSocket_instances, "m", _RedisSocket_onSocketError).call(this, new errors_1.SocketClosedUnexpectedlyError());
                                                                                                                     ^
SocketClosedUnexpectedlyError: Socket closed unexpectedly
    at Socket.<anonymous> (/workspaces/renovate/node_modules/.pnpm/@redis+client@1.5.13/node_modules/@redis/client/dist/lib/client/socket.js:195:118)
    at Object.onceWrapper (node:events:633:26)
    at Socket.emit (node:events:518:28)
    at Socket.emit (node:domain:488:12)
    at TCP.<anonymous> (node:net:337:12)
 ELIFECYCLE  Command failed with exit code 1

To resolve this, Azure advices to configure the pingInterval when creating a Redis connection.

Context

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This PR is included in version 37.188.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 37.188.0

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