Add MetaProcessor to README list

README.md

@@ -331,6 +331,7 @@ Similar to providers, but can only serve to populate records into a zone, cannot
 | [AcmeMangingProcessor](/octodns/processor/acme.py) | Useful when processes external to octoDNS are managing acme challenge DNS records, e.g. LetsEncrypt |
 | [AutoArpa](/octodns/processor/arpa.py) | See [Automatic PTR generation](#automatic-ptr-generation) below |
 | [IgnoreRootNsFilter](/octodns/processor/filter.py) | Filter that INGORES root/APEX NS records and prevents octoDNS from trying to manage them (where supported.) |
+| [MetaProcessor](/octodns/processor/meta.py) | Adds a special meta record with timing, UUID, providers, and/or version to aid in debugging and monitoring. |
 | [NameAllowlistFilter](/octodns/processor/filter.py) | Filter that ONLY manages records that match specified naming patterns, all others will be ignored |
 | [NameRejectlistFilter](/octodns/processor/filter.py) | Filter that INGORES records that match specified naming patterns, all others will be managed |
 | [OwnershipProcessor](/octodns/processor/ownership.py) | Processor that implements ownership in octoDNS so that it can manage only the records in a zone in sources and will ignore all others. |