mobile v0.1 with deployment for ios (#191)

* stage 1: project init

* stage 2: skeleton with navigation

* step 2.5: streams list

* step 4: stream playback experience

* step 5-6: compose experience

* fix: broken record

* transcode media particles to mp4

* build: reproducible go generate

* build: rename skaffold module for particle processor worker

* infra: increase particle processor worker resources

Was dealing with OOM errors

* tweaks to mobile

* log transcode work

* view on desktop placeholder

* tweak padding

* cap video resolution to save on memory

* infra: bump memory limits as insurance

* ux improvements

* update bundle id for mobile

* config for mobile

go/internal/depot/models.go

@@ -29,6 +29,15 @@ type PrepareUploadResult struct {
 	UploadHeaders map[string]string
 }
 
+// CreateFromReaderInput is for server-side direct uploads (no presigned URL).
+// Used by background workers that already have the bytes on hand and don't
+// need a client round-trip.
+type CreateFromReaderInput struct {
+	Prefix      string // Optional prefix for organizing objects (e.g., network_id)
+	Name        string
+	ContentType string
+}
+
 // Config holds configuration for the depot service
 type Config struct {
 	GoogleServiceAccountEmail string