Journaling: search, read and export over JMAP, and the chain check

Phase 4 of the journaling spec.

- inbuxa:JournalEntry/query and /get (sysJournalSearch): filter by time,
  sender, recipient, either, direction, subject words, Message-ID and
  journal, newest first; the whole report only when asked for.
- inbuxa:JournalExport/set (sysJournalExport): a reason is required; a
  ZIP of the matching reports with manifest.csv, exceptions.csv and
  manifest.sha256, up to 10,000 reports and 1 GB.
- inbuxa:JournalVerification/set (sysJournalGet): chains and reports
  rechecked.
- Every search, listing, read, export and check is written to the audit
  log before anything is returned, with existing actions only.
- Catalog entries for the three objects; spec as-built notes.

journal_tests: administrators can't search; a Compliance Officer searches,
lists, reads a report, exports (reason required) and checks the chain;
the officer can't change journals; each of those is in the audit log.

crates/jmap-proto/src/request/mod.rs

@@ -127,6 +127,7 @@ pub enum GetRequestMethod {
     MailRule(Box<GetRequest<crate::object::inbuxa_mail_rule::MailRule>>),
     SecurityAcceptance(Box<GetRequest<crate::object::inbuxa_security_acceptance::SecurityAcceptance>>),
     Journal(Box<GetRequest<crate::object::inbuxa_journal::Journal>>),
+    JournalEntry(Box<GetRequest<crate::object::inbuxa_journal_entry::JournalEntry>>),
     HeldMessage(Box<GetRequest<crate::object::inbuxa_held_message::HeldMessage>>),
     HoldExport(Box<GetRequest<crate::object::inbuxa_hold_export::HoldExport>>),
     ProtocolPolicy(Box<GetRequest<crate::object::inbuxa_protocol_policy::ProtocolPolicy>>),
@@ -169,6 +170,8 @@ pub enum SetRequestMethod<'x> {
         Box<SetRequest<'x, crate::object::inbuxa_security_acceptance::SecurityAcceptance>>,
     ),
     Journal(Box<SetRequest<'x, crate::object::inbuxa_journal::Journal>>),
+    JournalExport(Box<SetRequest<'x, crate::object::inbuxa_journal_entry::JournalExport>>),
+    JournalVerification(Box<SetRequest<'x, crate::object::inbuxa_journal_entry::JournalVerification>>),
     HeldMessage(Box<SetRequest<'x, crate::object::inbuxa_held_message::HeldMessage>>),
     HoldExport(Box<SetRequest<'x, crate::object::inbuxa_hold_export::HoldExport>>),
     ProtocolPolicy(Box<SetRequest<'x, crate::object::inbuxa_protocol_policy::ProtocolPolicy>>),
@@ -203,6 +206,7 @@ pub enum QueryRequestMethod {
     ShareNotification(Box<QueryRequest<ShareNotification>>),
     Registry(Box<QueryRequest<Registry>>),
     AuditEvent(Box<QueryRequest<crate::object::inbuxa_audit::AuditEvent>>),
+    JournalEntry(Box<QueryRequest<crate::object::inbuxa_journal_entry::JournalEntry>>),
 }
 
 #[derive(Debug)]