Description

Add notes to the search service README clarifying that:

1. Enabling Tika does not automatically re-extract content from already indexed files
2. The opencloud search index --all-spaces command skips files with unchanged modification time
3. Workaround: delete the Bleve search index before re-indexing to force full content extraction

Related Issue

• Fixes How to verify tika is indexing files opencloud-compose#217

Motivation and Context

When users enable Tika on an existing instance, they expect full-text search to work for all files. However, opencloud search index --all-spaces skips files already in the index (mtime-based check in services/search/pkg/search/service.go), so the Tika extractor is never called for previously indexed files. This is undocumented and confusing.

How Has This Been Tested?

• test environment: Read the source code in services/search/pkg/search/service.go (IndexSpace method, mtime skip logic at line ~495)
• test case 1: Verified the skip behavior by tracing the code path: IndexSpace → Walk → mtime check → skip if already indexed
• test case 2: Confirmed no --force flag exists in the CLI or protobuf definition (IndexSpaceRequest)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation added