Address grill feedback: BT.709 tagging, per-job cancel, frameRateCap clamp

B1: Android encoder format now sets KEY_COLOR_STANDARD = BT709,
KEY_COLOR_TRANSFER = SDR_VIDEO, KEY_COLOR_RANGE = LIMITED (API 24+).
Previously the encoder inherited or emitted default color metadata,
which meant HDR sources produced incorrectly-tagged output on Android.
iOS already had AVVideoColorPropertiesKey set correctly.

B2: Replace single currentCompressor reference with a per-job map
keyed by jobId. The cancel function now takes a jobId and only cancels
that specific job. Prevents the previous race where a second compress
call overwrote the reference and made the first job uncancellable.

B3: Clamp frameRateCap to >= 1 at the native module boundary. Previously
a value of 0 from JS would cause divide-by-zero (Android Long division
ArithmeticException, iOS CMTime Infinity / Int32(0) frameDuration trap).

modules/expo-bluesky-video-compress/android/src/main/java/expo/modules/blueskyvideocompress/ExpoBlueskyVideoCompressModule.kt

@@ -2,9 +2,10 @@ package expo.modules.blueskyvideocompress
 
 import expo.modules.kotlin.modules.Module
 import expo.modules.kotlin.modules.ModuleDefinition
+import java.util.concurrent.ConcurrentHashMap
 
 class ExpoBlueskyVideoCompressModule : Module() {
-  private var currentCompressor: VideoCompressor? = null
+  private val activeCompressors = ConcurrentHashMap<Int, VideoCompressor>()
 
   override fun definition() = ModuleDefinition {
     Name("ExpoBlueskyVideoCompress")
@@ -23,7 +24,7 @@ class ExpoBlueskyVideoCompressModule : Module() {
       val targetBitrate = (options["targetBitrate"] as? Number)?.toInt() ?: 0
       val maxSize = (options["maxSize"] as? Number)?.toInt() ?: 1920
       val codecPref = (options["codec"] as? String) ?: "auto"
-      val frameRateCap = (options["frameRateCap"] as? Number)?.toInt() ?: 30
+      val frameRateCap = ((options["frameRateCap"] as? Number)?.toInt() ?: 30).coerceAtLeast(1)
       val jobId = (options["jobId"] as? Number)?.toInt() ?: 0
 
       val compressor = VideoCompressor(
@@ -42,21 +43,20 @@ class ExpoBlueskyVideoCompressModule : Module() {
         }
       )
 
-      currentCompressor = compressor
+      activeCompressors[jobId] = compressor
 
       try {
         val result = compressor.compress()
-        currentCompressor = null
+        activeCompressors.remove(jobId)
         return@AsyncFunction result
       } catch (e: Exception) {
-        currentCompressor = null
+        activeCompressors.remove(jobId)
         throw e
       }
     }
 
-    Function("cancel") {
-      currentCompressor?.cancel()
-      currentCompressor = null
+    Function("cancel") { jobId: Int ->
+      activeCompressors.remove(jobId)?.cancel()
     }
   }
 }

modules/expo-bluesky-video-compress/android/src/main/java/expo/modules/blueskyvideocompress/VideoCompressor.kt

@@ -148,6 +148,11 @@ class VideoCompressor(
         )
         setInteger(MediaFormat.KEY_FRAME_RATE, frameRateCap)
         setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, I_FRAME_INTERVAL)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+          setInteger(MediaFormat.KEY_COLOR_STANDARD, MediaFormat.COLOR_STANDARD_BT709)
+          setInteger(MediaFormat.KEY_COLOR_TRANSFER, MediaFormat.COLOR_TRANSFER_SDR_VIDEO)
+          setInteger(MediaFormat.KEY_COLOR_RANGE, MediaFormat.COLOR_RANGE_LIMITED)
+        }
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
           setInteger(MediaFormat.KEY_PRIORITY, 0)
           setInteger(MediaFormat.KEY_OPERATING_RATE, frameRateCap)