Function record_search 

pub fn record_search(
    modeled_baseline: usize,
    observed_tokens: usize,
    output_tokens: usize,
    pattern: &str,
    path: &str,
    duration: Duration,
    output_excerpt: &str,
)

Record a search/grep operation with full Context OS side effects.

modeled_baseline (native-tool estimate, GL #479 D1) feeds the estimated stats series; observed_tokens (raw measured match lines, no factor) feeds the verified ledger (GL #479 D2). pattern/path/duration/output_excerpt feed the Context IR lineage (#566).