Fix Cloneable and Serializable class metadata

[dlunch]

Summary

• add missing Cloneable and Serializable metadata to 15 Java runtime classes
• register java/io/Serializable before java/lang/Class during bootstrap to avoid recursive class loading

Root cause

Several runtime class prototypes omitted marker interfaces declared by their public Java API. Adding Serializable to java.lang.Class also exposed an initialization cycle: class registration attempted to resolve Serializable before Class itself was available. Pre-registering the dependency as a bootstrap definition keeps the existing loading model while breaking that cycle.

Validation

• cargo test -p java_runtime (483 passed)
• cargo fmt --all -- --check
• git diff --check

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.61%. Comparing base (a1e6fdf) to head (27822c8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #200   +/-   ##
=======================================
  Coverage   86.61%   86.61%           
=======================================
  Files         308      308           
  Lines       41532    41539    +7     
=======================================
+ Hits        35972    35979    +7     
  Misses       5560     5560           

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[Copilot]

Pull request overview

This PR corrects Java marker-interface metadata in the Rust-based Java runtime, and adjusts JVM bootstrap ordering to avoid a class-loading cycle introduced by making java/lang/Class implement java/io/Serializable.

Changes:

• Add missing Cloneable / Serializable interfaces to a set of Java runtime class prototypes.
• Register/load java/io/Serializable before java/lang/Class during JVM bootstrap.
• Add a new test validating direct vs inherited marker interfaces via public java.lang.Class APIs.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
jvm/src/jvm.rs	Adjust bootstrap class load order to register java/io/Serializable before java/lang/Class.
java_runtime/tests/classes/java/mod.rs	Include the new marker-interface test module in the test suite.
java_runtime/tests/classes/java/test_marker_interfaces.rs	New test validating marker interfaces for direct/inherited/negative cases using reflection APIs.
java_runtime/src/classes/java/lang/class.rs	Declare java/lang/Class as implementing java/io/Serializable.
java_runtime/src/classes/java/lang/throwable.rs	Declare java/lang/Throwable as implementing java/io/Serializable.
java_runtime/src/classes/java/io/file.rs	Declare java/io/File as implementing java/io/Serializable.
java_runtime/src/classes/java/net/url.rs	Declare java/net/URL as implementing java/io/Serializable.
java_runtime/src/classes/java/util/calendar.rs	Declare java/util/Calendar as implementing java/io/Serializable and java/lang/Cloneable.
java_runtime/src/classes/java/util/array_list.rs	Declare java/util/ArrayList as implementing java/lang/Cloneable and java/io/Serializable.
java_runtime/src/classes/java/util/hash_map.rs	Declare java/util/HashMap as implementing java/lang/Cloneable and java/io/Serializable.
java_runtime/src/classes/java/util/hash_set.rs	Declare java/util/HashSet as implementing java/lang/Cloneable and java/io/Serializable.
java_runtime/src/classes/java/util/hashtable.rs	Declare java/util/Hashtable as implementing java/lang/Cloneable and java/io/Serializable (in addition to java/util/Map).
java_runtime/src/classes/java/util/vector.rs	Declare java/util/Vector as implementing java/lang/Cloneable and java/io/Serializable (in addition to java/util/List).
java_runtime/src/classes/java/util/jar/attributes.rs	Declare java/util/jar/Attributes as implementing java/lang/Cloneable.
java_runtime/src/classes/java/util/jar/manifest.rs	Declare java/util/jar/Manifest as implementing java/lang/Cloneable.
java_runtime/src/classes/java/util/logging/level.rs	Declare java/util/logging/Level as implementing java/io/Serializable.
java_runtime/src/classes/java/util/logging/log_record.rs	Declare java/util/logging/LogRecord as implementing java/io/Serializable.
java_runtime/src/classes/java/util/zip/zip_entry.rs	Declare java/util/zip/ZipEntry as implementing a marker interface (updated in this PR).

Suppressed comments (1)

java_runtime/tests/classes/java/test_marker_interfaces.rs:61

• JarEntry inherits marker interfaces from ZipEntry. If ZipEntry is updated to implement Serializable, the inherited marker expectations should include java/io/Serializable as well.

        ("java/util/Stack", &["java/lang/Cloneable", "java/io/Serializable"]),
        ("java/util/LinkedHashMap", &["java/lang/Cloneable", "java/io/Serializable"]),
        ("java/util/jar/JarEntry", &["java/lang/Cloneable"]),
    ];

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