Add java.util.logging (JUL) bridge for ChromaLogger

[oss-amikos]

Summary

The ChromaLogger interface provides structured logging for transport-level events. A java.util.logging bridge would give users a zero-dependency logging option that works out of the box with any JDK.

Proposal

Add a JulChromaLogger that implements ChromaLogger and delegates to a java.util.logging.Logger:

• debug(event, fields) → logger.fine(event + " " + formatFields(fields))
• info(event, fields) → logger.info(event + " " + formatFields(fields))
• warn(event, fields) → logger.warning(event + " " + formatFields(fields))
• error(event, fields, throwable) → logger.log(Level.SEVERE, event + " " + formatFields(fields), throwable)

Usage

Client client = ChromaClient.builder()
        .baseUrl("http://localhost:8000")
        .logger(JulChromaLogger.create()) // uses "tech.amikos.chromadb" logger name
        .build();

Considerations

• Zero additional dependencies — JUL is built into the JDK
• Could serve as the default logger (instead of noop) so users get logging out of the box
• Consider whether this should be wired automatically when no logger is explicitly set
• Factory method pattern: JulChromaLogger.create() for default, .create(String name) for custom logger name
• Guard field formatting behind level checks (logger.isLoggable(Level.FINE)) to avoid allocation when disabled
• Java 8 compatible

References

• ChromaLogger interface: src/main/java/tech/amikos/chromadb/v2/ChromaLogger.java
• ChromaLoggers (noop impl): src/main/java/tech/amikos/chromadb/v2/ChromaLoggers.java
• Builder wiring: ChromaClient.Builder.logger(ChromaLogger)