feat(search): motion photo facet

[dschmidt]

Stacked on #3198 (tika facets).

Adds the Google Motion Photo facet (version, presentationTimestampUs, videoSize) end to end.

• reads the Motion Photo XMP that Tika flattens into Camera: keys, covering the current MotionPhoto scheme and the legacy MicroVideo scheme. Per the spec only a marker value of 1 counts, anything else is treated as a still image. The marker is required: without it a picture that merely carries a video would look like a motion photo.
• takes videoSize from the video itself, the Content-Length of the document Tika extracted. No XMP container arithmetic.
• confirms the video is actually present (a Google Photos share keeps the XMP but strips the appended video) by letting Tika extract it: the facet survives only when the recursive metadata carries an embedded video/* document. Verified against all three cases with a Tika built from TIKA-4869: Emit the video of a motion photo as an embedded document apache/tika#3115: MotionPhoto and MicroVideo both yield the video as a second document, the stripped file yields one document and no facet.
• requires Tika 4 for the Camera: keys, and TIKA-4869: Emit the video of a motion photo as an embedded document apache/tika#3115 for the extracted video and its Content-Length. That one is not released yet, so until it ships the facet always stays empty: no released Tika extracts the video.
• adds the MotionPhoto search proto message + facet, wires it through the bleve and OpenSearch backends and the graph driveItem (@libre.graph.motionPhoto).

One preparatory commit first: getFirstValue now tries multiple metadata keys (Motion Photo vs legacy MicroVideo).

Needs a separate reva change, not includable here: the WebDAV PROPFIND handler must know the motionPhoto keys to expose the facet over WebDAV. It lives in vendored reva, so it needs its own reva PR + dependency bump. The required diff:

diff --git a/vendor/github.com/opencloud-eu/reva/v2/internal/http/services/owncloud/ocdav/propfind/propfind.go b/vendor/github.com/opencloud-eu/reva/v2/internal/http/services/owncloud/ocdav/propfind/propfind.go
index d86367a2c5..f40f4ec082 100644
--- a/vendor/github.com/opencloud-eu/reva/v2/internal/http/services/owncloud/ocdav/propfind/propfind.go
+++ b/vendor/github.com/opencloud-eu/reva/v2/internal/http/services/owncloud/ocdav/propfind/propfind.go
@@ -107,6 +107,11 @@ var (
 		"orientation",
 		"takenDateTime",
 	}
+	motionPhotoKeys = []string{
+		"version",
+		"presentationTimestampUs",
+		"videoSize",
+	}
 )
 
 type countingReader struct {
@@ -887,6 +892,8 @@ func metadataKeys(pf XML) ([]string, []string) {
 					metadataKeys = append(metadataKeys, metadataKeysWithPrefix("libre.graph.image", imageKeys)...)
 				case "http://owncloud.org/ns/photo":
 					metadataKeys = append(metadataKeys, metadataKeysWithPrefix("libre.graph.photo", photoKeys)...)
+				case "http://owncloud.org/ns/motionPhoto":
+					metadataKeys = append(metadataKeys, metadataKeysWithPrefix("libre.graph.motionPhoto", motionPhotoKeys)...)
 				default:
 					metadataKeys = append(metadataKeys, key)
 				}
@@ -944,7 +951,7 @@ func requiresExplicitFetching(n *xml.Name) bool {
 		}
 	case net.NsOwncloud:
 		switch n.Local {
-		case "favorite", "share-types", "checksums", "size", "tags", "audio", "location", "image", "photo":
+		case "favorite", "share-types", "checksums", "size", "tags", "audio", "location", "image", "photo", "motionPhoto":
 			return true
 		default:
 			return false
@@ -1292,6 +1299,7 @@ func mdToPropResponse(ctx context.Context, pf *XML, md *provider.ResourceInfo, p
 			appendMetadataProp(k, "oc", "location", "libre.graph.location", locationKeys)
 			appendMetadataProp(k, "oc", "image", "libre.graph.image", imageKeys)
 			appendMetadataProp(k, "oc", "photo", "libre.graph.photo", photoKeys)
+			appendMetadataProp(k, "oc", "motionPhoto", "libre.graph.motionPhoto", motionPhotoKeys)
 		}
 
 		if md.Type == provider.ResourceType_RESOURCE_TYPE_CONTAINER {
@@ -1579,6 +1587,10 @@ func mdToPropResponse(ctx context.Context, pf *XML, md *provider.ResourceInfo, p
 					if k := md.GetArbitraryMetadata().GetMetadata(); k != nil {
 						appendMetadataProp(k, "oc", "photo", "libre.graph.photo", photoKeys)
 					}
+				case "motionPhoto":
+					if k := md.GetArbitraryMetadata().GetMetadata(); k != nil {
+						appendMetadataProp(k, "oc", "motionPhoto", "libre.graph.motionPhoto", motionPhotoKeys)
+					}
 				case "name":
 					appendToOK(prop.Escaped("oc:name", md.Name))
 				case "shareid":

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 25 complexity · 4 duplication

Metric	Results
Complexity	25
Duplication	4

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🟢 Coverage 40.00% diff coverage

Metric	Results
Coverage variation	Report missing for f5a06431
Diff coverage	✅ 40.00% diff coverage

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Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (f5a0643)	Report Missing	Report Missing	Report Missing
Head commit (3515594)	88120	20605	23.38%

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 (#3200)	130	52	40.00%

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