fix(mirror): add max auth request age configuration (#9812)

# Which Problems Are Solved

The `auth.auth_requests` table is not cleaned up so long running Zitadel
installations can contain many rows.

The mirror command can take long because a the data are first copied
into memory (or disk) on cockroach and users do not get any output from
mirror. This is unfortunate because people don't know if Zitadel got
stuck.

# How the Problems Are Solved

Enhance logging throughout the projection processes and introduce a
configuration option for the maximum age of authentication requests.

# Additional Changes

None

# Additional Context

closes https://github.com/zitadel/zitadel/issues/9764

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>
(cherry picked from commit 181186e477)

docs/docs/self-hosting/manage/cli/mirror.mdx

@@ -158,6 +158,9 @@ Destination:
 
 # As cockroachdb first copies the data into memory this parameter is used to iterate through the events table and fetch only the given amount of events per iteration
 EventBulkSize: 10000 # ZITADEL_EVENTBULKSIZE
+# The maximum duration an auth request was last updated before it gets ignored.
+# Default is 30 days
+MaxAuthRequestAge: 720h # ZITADEL_MAXAUTHREQUESTAGE
 
 Projections:
   # Defines how many projections are allowed to run in parallel