* fix(cloudflare): custom hostnames edge-cases causing duplicates
* syntax/style
* Use %q log fmt for cloudflare provider code
* move custom hostnames related submitChanges() implementation to a separate method submitCustomHostnameChanges(); extend truncated logging
* use maps for DNS records getRecordID() and custom hostnames getCustomHostname() for faster lookups
* types for records/custom hostnames maps
* tidy up using underlying maps for dns records and custom hostnames
* style/naming
* fix private names
* combine unnecessarily separated conditions
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