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

extension/schema.sql

@@ -0,0 +1,34 @@
+-- CREATE TABLE files (
+--     id          INTEGER PRIMARY KEY,
+--     path        TEXT    NOT NULL UNIQUE,
+--     language    TEXT    NOT NULL,
+--     package     TEXT,
+--     hash        TEXT    NOT NULL,
+--     indexed_at  DATETIME DEFAULT CURRENT_TIMESTAMP
+-- );
+-- 
+-- CREATE TABLE symbols (
+--     id          INTEGER PRIMARY KEY,
+--     file_id     INTEGER NOT NULL REFERENCES files(id) ON DELETE CASCADE,
+--     name        TEXT    NOT NULL,
+--     kind        TEXT    NOT NULL CHECK(kind IN (
+--         'function', 'method', 'class', 'type',
+--         'interface', 'constant', 'variable', 'constructor'
+--     )),
+--     line        INTEGER NOT NULL,
+--     line_end    INTEGER,
+--     col         INTEGER,
+--     col_end     INTEGER,
+--     exported    BOOLEAN,
+--     parent_id   INTEGER REFERENCES symbols(id),
+--     UNIQUE(file_id, name, kind, line)
+-- );
+-- 
+-- CREATE INDEX idx_symbols_name ON symbols(name);
+-- CREATE INDEX idx_symbols_kind ON symbols(kind);
+-- CREATE INDEX idx_symbols_file_line ON symbols(file_id, line);
+-- CREATE INDEX idx_symbols_parent ON symbols(parent_id);
+-- CREATE INDEX idx_symbols_exported ON symbols(exported, kind);
+-- CREATE INDEX idx_files_path ON files(path);
+-- CREATE INDEX idx_files_language ON files(language);
+-- CREATE INDEX idx_files_package ON files(package);