Add delete stale nodes command

[butonic]

This PR fixes the delete stale nodes command to properly handle node cleanup by implementing event-driven revert operations instead of direct file system deletion. The fix ensures that stale processing nodes are properly rolled back through the event system rather than being forcefully removed.

• Replaces direct file deletion with event-based revert revision mechanism
• Updates function signatures to accept an event stream parameter
• Adds resource ID extraction functionality for proper event handling
• Adds documentation

builds on opencloud-eu/reva#821 and contains a reva bump

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 42 complexity

Metric	Results
Complexity	42

View in Codacy

🟢 Coverage 0.00% diff coverage · -0.05% coverage variation

Metric	Results
Coverage variation	✅ -0.05% coverage variation (-1.00%)
Diff coverage	✅ 0.00% diff coverage

View coverage diff in Codacy

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (4dec190)	89111	21642	24.29%
Head commit (5ff51c1)	89275 (+164)	21640 (-2)	24.24% (-0.05%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#3593)	164	0	0.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[butonic]

@fschade I think the prefix might be related to some of your changes. Could you review this?