duplicates: perceptual hash + soft-mark resolution + upload 409

Adds pHash + dHash columns alongside the existing blake3 content_hash so
near-duplicates (re-encoded, resized, format-converted copies) become
queryable. /duplicates/{exact,perceptual} return groups; /duplicates/
{resolve,unresolve} flip a duplicate_of_hash soft-mark on losing rows
and union perceptual-only tag sets onto the survivor. The default
/photos listing filters duplicate_of_hash IS NULL so demoted siblings
stop cluttering the grid; include_duplicates=true opts back in for
Apollo's review modal. Upload now hashes bytes pre-write and returns
409 with the canonical sibling when a file's bytes already exist.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/data/mod.rs

@@ -165,6 +165,15 @@ pub struct FilesRequest {
     /// Optional library filter. Accepts a library id (e.g. "1") or name
     /// (e.g. "main"). When omitted, results span all libraries.
     pub library: Option<String>,
+
+    /// When true, include rows soft-marked as duplicates of another file
+    /// (i.e. `image_exif.duplicate_of_hash IS NOT NULL`). Default false —
+    /// the standard /photos listing hides demoted siblings so the grid
+    /// silently shrinks after a resolve. The Apollo duplicates modal
+    /// passes `true` so it can show both survivors and demoted members
+    /// inside a group.
+    #[serde(default)]
+    pub include_duplicates: Option<bool>,
 }
 
 #[derive(Copy, Clone, Deserialize, PartialEq, Debug)]