perf(l10n): optimize usages query from O(N*W) global resolution to targeted lookup (19x faster)

Replace the global resolve-all-then-filter approach with a targeted search from
known records to their usages. Pre-filter candidates via HashSet membership checks
on metadata keys, wrapper IDs, and wrapper names, then resolve only the small
candidate set. Also fix a pre-existing wrapper-caller double-counting bug where
callers already represented as owners of direct usages were listed twice, and add
catalog proximity dedup for multi-catalog projects.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ahavili

grapha/src/app/query.rs

@@ -9,7 +9,9 @@ use crate::{
     SymbolCommands, assets, cache, changes, config, fields, localization, query, render, search,
 };
 
-use super::index::{load_graph, load_graph_for_l10n, load_graph_for_l10n_usages, open_search_index};
+use super::index::{
+    load_graph, load_graph_for_l10n, load_graph_for_l10n_usages, open_search_index,
+};
 
 fn query_cache_key(parts: &[&str]) -> String {
     parts.join("\0")

grapha/src/localization.rs

@@ -294,9 +294,7 @@ fn build_catalog_snapshot(
                     .trim_matches('"')
                     .to_string(),
                 comment: entry.comment.clone(),
-                translations: translations_by_key
-                    .remove(&entry.id)
-                    .unwrap_or_default(),
+                translations: translations_by_key.remove(&entry.id).unwrap_or_default(),
             });
         }
     }
@@ -538,7 +536,7 @@ fn closest_records(
         .collect()
 }
 
-fn directory_distance(usage_file: &Path, catalog_dir: &str) -> usize {
+pub fn directory_distance(usage_file: &Path, catalog_dir: &str) -> usize {
     let usage_dir = usage_file.parent().unwrap_or_else(|| Path::new("."));
     let usage_components = normalized_components(usage_dir);
     let catalog_components = normalized_components(Path::new(catalog_dir));