refactor(logger): bind repeated log context with child loggers

[goastler]

What

Replace places where a logger was passed/held and the same contextual metadata was re-attached on every individual log call with a single child logger created via Logger.with(...), which binds that context once.

Changes

• database — base/mongo.ts: bind mongoUrl once in the constructor (was repeated across ~11 connect()/close() log calls).
• redis-client — redisClient.ts: bind url in connectToRedis and name in setupRedisIndex once each.
• env — provider.ts: bind failedFuncName once in cleanup() (was duplicated across two error handlers).
• provider — util.ts: bind challengeIp/providedIp once at the top of deepValidateIpAddress (was repeated across ~7 log calls).

No behavioural change — the same fields are emitted, just bound once instead of inline. Type-checked (build:tsc) for all four packages.