refactor(ai-formats): group formats by provider

Move protocol/request/response format modules under provider-oriented formats modules and update registry, transport, and architecture paths.

crates/aether-ai-formats/src/formats/openai/video/mod.rs

@@ -0,0 +1 @@
+pub mod spec;

crates/aether-ai-formats/src/formats/openai/video/spec.rs

@@ -0,0 +1,27 @@
+use crate::contracts::OPENAI_VIDEO_CREATE_SYNC_PLAN_KIND;
+use crate::formats::shared::video::{LocalVideoCreateFamily, LocalVideoCreateSpec};
+
+pub fn resolve_sync_spec(plan_kind: &str) -> Option<LocalVideoCreateSpec> {
+    match plan_kind {
+        OPENAI_VIDEO_CREATE_SYNC_PLAN_KIND => Some(LocalVideoCreateSpec {
+            api_format: "openai:video",
+            decision_kind: OPENAI_VIDEO_CREATE_SYNC_PLAN_KIND,
+            report_kind: "openai_video_create_sync_finalize",
+            family: LocalVideoCreateFamily::OpenAi,
+        }),
+        _ => None,
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{resolve_sync_spec, LocalVideoCreateFamily};
+
+    #[test]
+    fn resolves_openai_video_create_spec() {
+        let spec = resolve_sync_spec("openai_video_create_sync").expect("spec");
+        assert_eq!(spec.api_format, "openai:video");
+        assert_eq!(spec.family, LocalVideoCreateFamily::OpenAi);
+        assert_eq!(spec.report_kind, "openai_video_create_sync_finalize");
+    }
+}