feat(cleanDockerImages): Add globalMaxDays and globalMaxCount

[g3n35i5]

Add Global Retention Policy Fallbacks for cleanDockerImages Plugin

Overview

This PR extends the cleanDockerImages plugin to support optional global fallback values for retention policies, eliminating the need to manually label every Docker image with retention policies.

Motivation

Previously, each Docker image had to be explicitly labeled with com.jfrog.artifactory.retention.maxDays and/or com.jfrog.artifactory.retention.maxCount in its Dockerfile. This approach had limitations:

• Requires rebuilding images to change retention policies
• Not practical for third-party images that can't be modified
• Tedious to manage retention across many images
• No way to set repository-wide defaults

Changes

New Configuration Options

Added two optional configuration parameters to cleanDockerImages.properties:

• globalMaxDays: Global fallback for maximum age retention (in days)
• globalMaxCount: Global fallback for maximum version count retention

These values apply to images that don't have explicit labels set. Set to null or omit to disable.

Implementation Details

• Global settings are loaded from the properties file on plugin execution
• Image-specific labels always take precedence over global settings
• Both maxDays and maxCount policies work with global fallbacks
• Compatible with existing byDownloadDate behavior

Code Changes

• Modified checkDaysPassedForDelete() and getMaxCountForDelete() to accept and use global fallback parameters
• Updated function signatures throughout the call chain to pass global settings
• Added type checking to handle both String (from labels) and Integer (from global config) property values
• Enhanced logging to indicate when global values are being used

Backward Compatibility

This change is fully backward compatible:

• Existing configurations without global settings continue to work unchanged
• Image-specific labels are still supported and take priority
• No breaking changes to the plugin API or execution parameters

Usage Example

# cleanDockerImages.properties
dockerRepos = ["docker-local", "docker-prod"]
byDownloadDate = false
globalMaxDays = 30
globalMaxCount = 5

[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[g3n35i5]

I have read the CLA Document and I hereby sign the CLA

[g3n35i5]

@jfrogdixit pinging you since you're the latest contributor with merge permissions. Do you have an ETA for a review?
Cheers!