refactor(schema): consolidate schema definition to single source of truth

extension/codexis.ts

@@ -15,27 +15,10 @@ import { existsSync } from "node:fs";
 import { join } from "node:path";
 import Database from "better-sqlite3";
 
-const SCHEMA = `-- .codexis/index.db schema:
---
--- files: indexed source files
---   id          INTEGER PRIMARY KEY
---   path        TEXT NOT NULL UNIQUE   -- relative to repo root
---   language    TEXT NOT NULL           -- e.g. 'go', 'typescript', 'python', 'tsx', 'proto'
---   package     TEXT                    -- package/module name (from AST or directory)
---   hash        TEXT NOT NULL           -- sha256, for incremental indexing
---   indexed_at  DATETIME
---
--- symbols: definitions extracted via tree-sitter
---   id          INTEGER PRIMARY KEY
---   file_id     INTEGER NOT NULL REFERENCES files(id)
---   name        TEXT NOT NULL
---   kind        TEXT NOT NULL           -- one of: 'function','method','class','type','interface','constant','variable','constructor'
---   line        INTEGER NOT NULL        -- 1-indexed
---   line_end    INTEGER                 -- end of definition body
---   col         INTEGER
---   col_end     INTEGER
---   exported    BOOLEAN                 -- language-specific visibility
---   parent_id   INTEGER REFERENCES symbols(id) -- e.g. method→class, field→struct`;
+// @ts-expect-error - generated file
+import schema from "./schema.sql?raw";
+
+const SCHEMA = schema;
 
 const DESCRIPTION = `Query the code index database (.codexis/index.db). Run read-only SQL to find symbols, files, and line numbers across the codebase.