refactor(media-proxy): split into modules and harden streaming (#2437)

fluxer_media_proxy/src/test_fixtures/mod.rs

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+mod adversarial;
+mod ffmpeg_cli;
+mod images;
+mod media;
+
+pub use adversarial::{
+    ADVERSARIAL_RANGE_HEADERS, ADVERSARIAL_TEXT_INPUTS, adversarial_media_bytes,
+};
+pub use ffmpeg_cli::{ffmpeg_gen_media, ffmpeg_gen_mp4, ffmpeg_gen_rotated_mp4, ffmpeg_mirror_mp4};
+pub use images::{
+    animated_gif_fixture, animated_gif_frames, apng_header, first_webp_anim_frame_size,
+    gif_frame_delays_cs, gif_loop_count, minimal_gif, png_dimensions, synthetic_bmp, synthetic_png,
+    webp_animation_loop_count, webp_canvas_size, webp_chunk_payloads, webp_with_metadata_chunk,
+};
+pub use media::{
+    fixture_audio_mp3_with_png_cover_art, fixture_audio_mp4_with_attached_picture,
+    fixture_audio_only_mp4, fixture_h264_mp4, fixture_jpeg, fixture_mkv_with_png_video_stream,
+    fixture_mp4_with_undecodable_video, synthetic_wav,
+};