chore(gates): lower the dead-code ceiling to 158

`session.resumed` made `SessionRecovery`'s `repaired_call_count`,
`duplicate_result_count` and `orphan_result_count` live outside tests, so the
three `#[cfg_attr(not(test), expect(dead_code))]` attributes went with it. The
measured count is now 158 (allow 105, expect 53) against a ceiling of 162.

The gate may go down freely; lowering it locks the win in so a later change
cannot quietly re-add a suppression. Regenerated with `--update`.

Verified: `python3 scripts/check-dead-code-budget.py` reports
"158 suppressions (allow=105, expect=53), budget 158 (0 under)".

Signed-off-by: CodeWhale Bot <[email protected]>

scripts/dead-code-budget.json

@@ -2,9 +2,9 @@
   "_comment": "Ceiling for dead-code suppressions across crates/, counting both `#[allow(dead_code)]` and `#[expect(dead_code)]`. `total` is the sum and is the ratcheted figure. It may go down freely; raising it needs a reviewer to say why in the PR. Regenerate with: python3 scripts/check-dead-code-budget.py --update",
   "_issue": "https://github.com/codewhale-hq/CodeWhale/issues/4785",
   "_expect_blind_spot": "Until #6241 this gate counted only the `allow` spelling, so rewriting an allow as an expect lowered the number without removing any dead code. The ceiling was re-based to the true combined count when that was fixed; it is not a regression.",
-  "total": 162,
+  "total": 158,
   "allow_total": 105,
-  "expect_total": 57,
+  "expect_total": 53,
   "per_crate": {
     "cli": {
       "allow": 0,
@@ -20,7 +20,7 @@
     },
     "runtime": {
       "allow": 9,
-      "expect": 3
+      "expect": 4
     },
     "sandbox": {
       "allow": 2,
@@ -44,7 +44,7 @@
     },
     "tui": {
       "allow": 71,
-      "expect": 51
+      "expect": 46
     }
   }
 }