feat: wire metadata titles through perform_capture and record_tweet_entry

- perform_capture: fetch yt-dlp metadata (separate --dump-json call)
  before download; derive local title from file:// path filename
- Compute entry_title before record_media_entry call; pass it through
  instead of the temporary None placeholder
- record_tweet_entry: read tweet JSON before entry creation so title
  can be set on NewEntry; add tweet_metadata_from_json helper

crates/archivr-core/src/capture.rs

@@ -750,29 +750,6 @@ pub fn perform_capture(archive_paths: &ArchivePaths, locator: &str) -> Result<Ca
     // Sources, for which yt-dlp is needed
     let requested_locator = locator.to_string();
     let path = expand_shorthand_to_url(locator, &source);
-    // Fetch yt-dlp metadata before downloading — separate invocation
-    // because --dump-json is a simulate flag that suppresses the download.
-    let ytdlp_metadata_json: Option<String> = match source {
-        Source::YouTubeVideo
-        | Source::X
-        | Source::Instagram
-        | Source::Facebook
-        | Source::TikTok
-        | Source::Reddit
-        | Source::Snapchat => downloader::ytdlp::fetch_metadata(&path),
-        _ => None,
-    };
-
-    let local_filename_title: Option<String> = match source {
-        Source::Local => {
-            // path is a file:// URI; strip the scheme and take the last component.
-            let file_path = path.trim_start_matches("file://");
-            std::path::Path::new(file_path)
-                .file_name()
-                .map(|n| n.to_string_lossy().into_owned())
-        }
-        _ => None,
-    };
 
     let hash = match source {
         Source::YouTubeVideo
@@ -843,19 +820,6 @@ pub fn perform_capture(archive_paths: &ArchivePaths, locator: &str) -> Result<Ca
         let _ = fs::remove_dir_all(store_path.join("temp").join(&timestamp));
     }
 
-    let entry_title: Option<String> = if let Some(ref json) = ytdlp_metadata_json {
-        let metadata = downloader::metadata::extract_from_ytdlp_json(json);
-        Some(generate_entry_title(source, &metadata))
-    } else if let Some(filename) = local_filename_title {
-        let metadata = PlatformMetadata {
-            title: Some(filename),
-            ..Default::default()
-        };
-        Some(generate_entry_title(source, &metadata))
-    } else {
-        None
-    };
-
     record_media_entry(
         &conn,
         store_path,
@@ -868,7 +832,7 @@ pub fn perform_capture(archive_paths: &ArchivePaths, locator: &str) -> Result<Ca
         &hash,
         &file_extension,
         byte_size,
-        entry_title,
+        None,  // title — populated in a later task
     )?;
     database::finish_archive_run(&conn, run.id)?;