fix: bug-fix sweep across node, audio, render, plugin subsystems

Node core:
- MathNode/TrigonometryNode combo strings realigned with Operation enums
- mathbase scalar/vector operand pick no longer uses bitwise type checks
- NodeSetPositionAndDependenciesRecursively moves dependencies again
- RemoveAllKeyframes undo actually restores keyframes
- NodeGroup GetInputName null-deref guard, passthrough ids use input id
- NodeValueTable::Has is an exact type match; tag fallback only for
  empty tags; kStrCombo/kPushButton get data type names
- delete_all_keyframes no longer loops forever on unparented keyframes;
  keyframe-load failures propagate; rational interpolation falls back to
  double; OpacityEffect no longer leaks its internal MathNode

Audio/footage:
- AudioVisualWaveform: GetSummaryFromTime underflow OOB read, TrimIn
  prepend length bookkeeping, OverwriteSums source channel indexing
- PanNode inserts the pan value into the sample job (keyframed pan
  works); OutputParamsChanged is emitted on device change; PortAudio
  device indices are validated before Pa_GetDeviceInfo
- Footage: AdjustTimeByLoopMode no longer hangs/UBs on degenerate
  lengths, GetStreamIndex bounds-checked, CheckFootage clears stale
  state on missing files, failed probes are not cached,
  FootageDescription::Load requires its own root element

Render/track:
- ViewerOutput pushes the tagged samples value; TrackList disconnects
  the track-height lambda; GetTrackFromReference validity check
- RenderManager dummy backend: null-initialized threads, guarded
  decoder-cache/timer paths; Renderer::Destroy releases color cache
  shaders/textures; unknown dynamic backends no longer alias to oakgl
- SharedMemoryRegion POSIX attach validates segment size; ReadMessage
  skips blank lines instead of failing; GC counter clamped;
  IsRenderingCustomRange implemented; TimeOffsetNode gets a true
  inverse OutputTimeAdjustment; zero-speed clips return the held frame

Plugin/nodes:
- OliveClip: stored default region of definition is honored, on-demand
  images are cached; OliveHost sets host identity properties and logs
  instead of showing modal dialogs offscreen; Plugin.h dead decls gone
- DespillNode guards graph-less use with Rec.709 fallback; description
  typos fixed (despill, swirl); mosaic applies when only one axis
  matches; Windows-only Project filename separator test fixed

app/node/inputimmediate.cpp

@@ -23,6 +23,7 @@
 
 #include "common/lerp.h"
 #include "common/tohex.h"
+#include "node.h"
 
 namespace olive
 {
@@ -289,11 +290,21 @@ void NodeInputImmediate::remove_keyframe(NodeKeyframe *key)
 void NodeInputImmediate::delete_all_keyframes(QObject *parent)
 {
 	for (NodeKeyframeTrack &track : keyframe_tracks_) {
-		while (!track.isEmpty()) {
+		// Iterate over a copy of the track, since the keyframes may be removed
+		// from it as we go
+		const NodeKeyframeTrack copy = track;
+
+		for (NodeKeyframe *key : copy) {
+			if (!dynamic_cast<Node *>(key->QObject::parent())) {
+				// Keyframe isn't parented to a node, so reparenting/deleting it
+				// won't remove it from the track automatically
+				remove_keyframe(key);
+			}
+
 			if (parent) {
-				track.first()->setParent(parent);
+				key->setParent(parent);
 			} else {
-				delete track.first();
+				delete key;
 			}
 		}
 	}