feat(java): add cluster metadata and leader redirection to TCP client

[mmodzelewski]

Java clients connected to a VSR follower had no way to discover
the cluster leader, so operations against a multi-node cluster
failed until the user manually pointed the client at the right
node.

Add the GET_CLUSTER_METADATA command with cluster roster models
and a binary deserializer. After login the async TCP client
fetches the roster and, when a healthy leader with an enabled
TCP endpoint lives elsewhere, reconnects to it and replays the
login. Redirections are capped at 3 consecutive hops so two
nodes both claiming leadership cannot ping-pong a client, and
every failure on the redirect path is non-fatal: the client
stays on the current node. Mirrors the Rust and Go SDKs.

Covered by a leader_redirection BDD scenario wired into the
cluster docker-compose setup.

[codecov]

Codecov Report

❌ Patch coverage is 82.63158% with 66 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.63%. Comparing base (64ae1e9) to head (da553e2).

Files with missing lines	Patch %	Lines
...ache/iggy/client/async/tcp/AsyncIggyTcpClient.java	47.77%	43 Missing and 4 partials ⚠️
.../apache/iggy/client/async/tcp/LeaderAwareness.java	92.63%	5 Missing and 2 partials ⚠️
...ache/iggy/client/async/tcp/AsyncTcpConnection.java	86.95%	3 Missing ⚠️
...lient/async/tcp/PersonalAccessTokensTcpClient.java	78.57%	2 Missing and 1 partial ⚠️
...g/apache/iggy/client/async/tcp/UsersTcpClient.java	84.21%	2 Missing and 1 partial ⚠️
...he/iggy/client/async/tcp/LoginRedirectionHook.java	0.00%	1 Missing ⚠️
.../java/org/apache/iggy/cluster/ClusterNodeRole.java	90.90%	1 Missing ⚠️
...ava/org/apache/iggy/cluster/ClusterNodeStatus.java	92.85%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             master    #3745    +/-   ##
==========================================
  Coverage     74.62%   74.63%            
- Complexity      969     1046    +77     
==========================================
  Files          1305     1313     +8     
  Lines        149590   149865   +275     
  Branches     125024   125046    +22     
==========================================
+ Hits         111631   111846   +215     
- Misses        34460    34513    +53     
- Partials       3499     3506     +7     

Components	Coverage Δ
Rust Core	74.95% <ø> (ø)
Java SDK	63.67% <82.63%> (+0.95%)	⬆️
C# SDK	72.26% <ø> (ø)
Python SDK	92.27% <ø> (ø)
PHP SDK	84.52% <ø> (ø)
Node SDK	92.11% <ø> (ø)
Go SDK	43.08% <ø> (ø)

Files with missing lines	Coverage Δ
...in/java/org/apache/iggy/client/ConnectionInfo.java	100.00% <100.00%> (ø)
...iggy/client/async/tcp/ConsumerGroupsTcpClient.java	100.00% <100.00%> (ø)
...ggy/client/async/tcp/ConsumerOffsetsTcpClient.java	92.85% <100.00%> (+0.26%)	⬆️
...pache/iggy/client/async/tcp/MessagesTcpClient.java	97.43% <100.00%> (+0.06%)	⬆️
...che/iggy/client/async/tcp/PartitionsTcpClient.java	100.00% <100.00%> (ø)
...apache/iggy/client/async/tcp/StreamsTcpClient.java	100.00% <100.00%> (ø)
.../apache/iggy/client/async/tcp/SystemTcpClient.java	100.00% <100.00%> (ø)
.../apache/iggy/client/async/tcp/TopicsTcpClient.java	95.83% <100.00%> (+0.48%)	⬆️
...he/iggy/client/blocking/http/SystemHttpClient.java	64.28% <100.00%> (+5.95%)	⬆️
...apache/iggy/client/blocking/tcp/IggyTcpClient.java	63.26% <100.00%> (+0.76%)	⬆️
... and 14 more

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.