Feat: reverse content flow

[marcelklehr]

No description provided.

[Copilot]

Pull request overview

This PR shifts ContextChat indexing/action processing from in-app background jobs/task processing providers to an external “pull” model by exposing queue endpoints and adding DB-level queue item locking.

Changes:

• Removed synchronous TaskProcessing providers and multiple background jobs/CLI scanning components.
• Added queue locking (locked_at) and lock-aware queue access methods in DB mappers (plus a schema migration).
• Introduced an OCS controller exposing ExApp endpoints to fetch/lock/delete queued work items and read file contents.

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 17 comments.

Show a summary per file

File	Description
lib/TaskProcessing/ContextChatSearchProvider.php	Removed legacy TaskProcessing search provider.
lib/TaskProcessing/ContextChatProvider.php	Removed legacy TaskProcessing chat provider (incl. indexing-on-demand logic).
lib/Service/ScanService.php	Removed file scanning/indexing service used by old flow.
lib/Service/QueueService.php	Simplified queue insertion/counting (job scheduling removed).
lib/Migration/Version006000000Date20260302135634.php	Adds locked_at columns + indexes to queue tables.
lib/Db/QueueMapper.php	Adds locking support and changes queue retrieval/removal APIs.
lib/Db/QueueFile.php	Adds locked_at field mapping + JSON serialization.
lib/Db/QueueContentItemMapper.php	Adds bulk delete, lock counting, and locking support for content queue items.
lib/Db/QueueContentItem.php	Adds locked_at field mapping + JSON serialization.
lib/Db/QueueActionMapper.php	Adds locking support, bulk delete, and lock-aware counts for actions.
lib/Db/QueueAction.php	Adds locked_at field mapping + JSON serialization.
lib/Controller/QueueController.php	New OCS endpoints for ExApp queue consumption + file streaming.
lib/Command/ScanFiles.php	Removed CLI scan command from old flow.
lib/BackgroundJobs/SubmitContentJob.php	Removed content submission background job from old flow.
lib/BackgroundJobs/IndexerJob.php	Removed file indexer background job from old flow.
lib/BackgroundJobs/ActionJob.php	Removed action-processing background job from old flow.

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[marcelklehr]

Should this be getFirstNodeById?

[marcelklehr]

Suggested change

	$locked = $queueMapper->countLocked();
	foreach ($contentItemMapper->countLocked() as $providerCount) {
	$locked += $providerCount;
	}
	return new DataResponse([ 'scheduled' => $count, 'running' => $locked ]);
	$lockedCount = $queueMapper->countLocked();
	foreach ($contentItemMapper->countLocked() as $providerCount) {
	$lockedCount += $providerCount;
	}
	return new DataResponse([ 'scheduled' => $count, 'running' => $lockedCount ]);

[marcelklehr]

to remove