feat(ownership): complete ownership intelligence module

Sprints 0-8: Types, schema, KSEI parser, entity resolution, DB CRUD,
Bing API client, import pipeline, query commands, graph traversal,
changes diff, entity resolution CLI, FTS5 search.

- KSEI PDF parser (mutool stext + quick-xml, 99.2% accuracy)
- 7 query commands: ticker, entity, search, cross-holders, concentration, flow, releases
- Ownership graph with recursive CTE (ASCII tree + Graphviz DOT)
- Release diff/changes between KSEI snapshots
- Entity resolution CLI: unresolved, map, merge
- FTS5 trigram search on entity names
- Feature-gated under 'ownership' (default-on)
- 82 tests passing

src/main.rs

@@ -5,6 +5,8 @@ mod cli;
 mod config;
 mod error;
 mod output;
+#[cfg(feature = "ownership")]
+pub mod ownership;
 
 use clap::CommandFactory;
 use clap::Parser;
@@ -70,6 +72,13 @@ fn run() -> Result<(), IdxError> {
                 return Err(err);
             }
         }
+        #[cfg(feature = "ownership")]
+        Commands::Ownership(cmd) => {
+            if let Err(err) = cli::ownership::handle(&cmd.command, &config) {
+                emit_error(&err, &config.output);
+                return Err(err);
+            }
+        }
     }
 
     Ok(())