[Subscription] Support per-topic uncommitted event recycle timeouts

[Caideyipi]

Description

Subscription events currently share the server-wide recycle timeout, which defaults to 600 seconds. Add the topic attribute recycle-uncommitted-event-interval-ms so each topic can override this timeout with a long value in milliseconds. Positive values enable recycling after the timeout; zero or negative values disable automatic recycling. Explicit NACK redelivery and ACK commits remain available. Topics without the attribute continue to use subscription_recycle_uncommitted_event_interval_ms, which also disables automatic recycling when set to zero or a negative value.

The attribute supports CREATE TOPIC and ALTER TOPIC across topic modes and response formats. Both Pipe and Consensus subscription queues apply updates to existing in-flight events, and Consensus queues wake when the setting changes without scheduling recycle retries while recycling is disabled. Runtime overrides are isolated by topic name and data model; metadata snapshot updates preserve existing overrides while they are being applied.

CREATE TOPIC t WITH ('recycle-uncommitted-event-interval-ms'='1200000');
ALTER TOPIC t WITH ('recycle-uncommitted-event-interval-ms'='300000');
ALTER TOPIC t WITH ('recycle-uncommitted-event-interval-ms'='0');

Validation

• Focused unit tests cover parsing, CREATE/ALTER validation, fallback, metadata updates, tree/table isolation, timeout redelivery, disabling/re-enabling recycling, and explicit NACK/ACK behavior in Pipe V1/V2 and Consensus queues.
• Full-reactor English build with 61 focused unit tests passing.
• Full-reactor Chinese compilation: mvn -nsu test-compile -DskipTests -P with-zh-locale.
• Spotless and git diff --check.

This PR has:

• been self-reviewed, including concurrent reads and metadata updates.
• added documentation for the topic attribute and the server fallback.
• added comments explaining runtime configuration access and snapshot handling.
• added or updated unit tests for the new behavior.

Key changed classes

TopicConfig, SubscriptionInfo, SubscriptionTopicAgent, SubscriptionPrefetchingQueue, ConsensusPrefetchingQueue, and SubscriptionEvent.