Make Ra segment_max_size_bytes configurable for quorum queues

Add support for configuring Ra's segment_max_size_bytes parameter via
rabbitmq.conf as raft.segment_max_size_bytes. This allows operators to
control the maximum size of Raft log segment files for quorum queues.
The configuration:
- Maps raft.segment_max_size_bytes in rabbitmq.conf to
  rabbit.quorum_segment_max_size_bytes in the application environment
- Defaults to Ra's built-in default of 64 MB when not configured
- Is explicitly applied to the quorum_queues Ra system configuration
  for transparency and maintainability
Also add a macro QUORUM_DEFAULT_SEGMENT_MAX_SIZE_B to align with Ra's
default value.

Author: kjnilsson

deps/rabbit/docs/rabbitmq.conf.example

@@ -737,6 +737,7 @@
 ## These set the defaults that quorum queues, streams, Khepri, and other Raft-based features use.
 ##
 # raft.segment_max_entries = 65536
+# raft.segment_max_size_bytes = 64000000
 # raft.wal_max_size_bytes = 1048576
 # raft.wal_max_batch_size = 4096
 # raft.snapshot_chunk_size = 1000000

deps/rabbit/priv/schema/rabbit.schema

@@ -2550,6 +2550,20 @@ end}.
     end
 }.
 
+{mapping, "raft.segment_max_size_bytes", "rabbit.quorum_segment_max_size_bytes", [
+  {datatype, integer},
+  {validators, ["non_zero_positive_integer"]}
+]}.
+
+{translation, "rabbit.quorum_segment_max_size_bytes",
+    fun(Conf) ->
+        case cuttlefish:conf_get("raft.segment_max_size_bytes", Conf, undefined) of
+            undefined -> cuttlefish:unset();
+            Val       -> Val
+        end
+    end
+}.
+
 {mapping, "raft.wal_max_size_bytes", "ra.wal_max_size_bytes", [
   {datatype, integer},
   {validators, ["non_zero_positive_integer"]}

deps/rabbit/src/rabbit_ra_systems.erl

@@ -25,6 +25,7 @@
 -define(COORD_WAL_MAX_SIZE_B, 64_000_000).
 -define(QUORUM_AER_MAX_RPC_SIZE, 16).
 -define(QUORUM_DEFAULT_WAL_MAX_ENTRIES, 500_000).
+-define(QUORUM_DEFAULT_SEGMENT_MAX_SIZE_B, 64_000_000).
 %% the default min bin vheap value in OTP 26
 -define(MIN_BIN_VHEAP_SIZE_DEFAULT, 46422).
 -define(MIN_BIN_VHEAP_SIZE_MULT, 64).
@@ -133,6 +134,8 @@ get_config(quorum_queues = RaSystem) ->
                           _ ->
                               ?MIN_BIN_VHEAP_SIZE_DEFAULT
                       end,
+    SegmentMaxSizeBytes = application:get_env(rabbit, quorum_segment_max_size_bytes,
+                                              ?QUORUM_DEFAULT_SEGMENT_MAX_SIZE_B),
 
     DefaultConfig#{name => RaSystem,
                    wal_min_bin_vheap_size => MinBinVheapSize,
@@ -142,6 +145,7 @@ get_config(quorum_queues = RaSystem) ->
                    wal_max_entries => WalMaxEntries,
                    segment_compute_checksums => SegmentChecksums,
                    compress_mem_tables => CompressMemTables,
+                   segment_max_size_bytes => SegmentMaxSizeBytes,
                    server_recovery_strategy => {rabbit_quorum_queue,
                                                 system_recover, []}};
 get_config(coordination = RaSystem) ->

deps/rabbit/test/config_schema_SUITE_data/rabbit.snippets

@@ -1071,6 +1071,13 @@ credential_validator.regexp = ^abc\\d+",
      ]}],
    []},
 
+  {raft_segment_max_size_bytes,
+   "raft.segment_max_size_bytes = 64000000",
+   [{rabbit, [
+      {quorum_segment_max_size_bytes, 64000000}
+     ]}],
+   []},
+
   {raft_wal_max_size_bytes,
    "raft.wal_max_size_bytes = 1048576",
    [{ra, [