Ensure SIGHUP never triggers a new email batch across all watch() implementations (#704)

* Initial plan

* Ensure SIGHUP never starts a new email batch in any watch() implementation

Co-authored-by: seanthegeek <44679+seanthegeek@users.noreply.github.com>
Agent-Logs-Url: https://github.com/domainaware/parsedmarc/sessions/45d5be30-8f6b-4200-9bdd-15c655033f17

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: seanthegeek <44679+seanthegeek@users.noreply.github.com>

parsedmarc/mail/graph.py

@@ -284,6 +284,8 @@ class MSGraphConnection(MailboxConnection):
             if should_reload and should_reload():
                 return
             sleep(check_timeout)
+            if should_reload and should_reload():
+                return
             check_callback(self)
 
     @lru_cache(maxsize=10)

parsedmarc/mail/imap.py

@@ -94,6 +94,8 @@ class IMAPConnection(MailboxConnection):
             check_callback(self)
 
         while True:
+            if should_reload and should_reload():
+                return
             try:
                 IMAPClient(
                     host=self._client.host,

parsedmarc/mail/maildir.py

@@ -65,6 +65,8 @@ class MaildirConnection(MailboxConnection):
 
     def watch(self, check_callback, check_timeout, should_reload=None):
         while True:
+            if should_reload and should_reload():
+                return
             try:
                 check_callback(self)
             except Exception as e: