perf(server): eliminate implicit full-collection clones by removing Store::read() in favor of read_with()

payload.json

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+{"code": "local buf = vim.fn.bufnr('server/src/search.rs')\nif buf == -1 then\n    vim.cmd('e server/src/search.rs')\n    buf = vim.api.nvim_get_current_buf()\nend\n\nvim.api.nvim_buf_set_lines(buf, 216, 222, false, {\n    '        &self,',\n    '        entities: &[Entity],',\n    '        tasks: &[Task],',\n    '        snippets: &[Snippet],',\n    '        adrs: &[Adr],'\n})\n\n-- We need to change the loop variables inside the task from values to clones if they are passed as slices\n-- Actually we can just clone the slice data before moving it into spawn_blocking\nvim.api.nvim_buf_set_lines(buf, 222, 223, false, {\n    '    ) -> tokio::task::JoinHandle<tantivy::Result<()>> {',\n    '        let entities = entities.to_vec();',\n    '        let tasks = tasks.to_vec();',\n    '        let snippets = snippets.to_vec();',\n    '        let adrs = adrs.to_vec();'\n})\n\nvim.cmd('write')\nrequire('notify')('Updated search index_batch signature', 'info', { title = 'Antigravity' })\nreturn 'ok'\n"}