fix(ci): raise the Mini ci_smoke Verilator budget to the 3600s tier

The feat/mini-hp-core merge adds the HP subsystem to the Mini Verilator
model, so the ci_smoke acceptance step (which ends in the crypto self-test)
exceeds the old 1800 s wall budget on hosted runners and fails with
SIM_TEST_TIMEOUT. The merged content is functionally correct: the identical
step passes locally with SIM_TEST_PASS code=0 in 1806 s wall
(build/ihp130-2026-10-23-11-20-cff97749f2f3/). This is a validation-only
budget change to the existing 3600 s tier already used by the SDRAM variant;
the contract tests in tests/test_script_tools.py are updated to pin the new
value. No RTL, firmware, or marker-rule change. CI failure under repair:
regression-ihp130 run 39889921334.

scripts/regress.py

@@ -27,7 +27,9 @@ CI_SMOKE_VERILATOR_VALUES = (
 CI_SMOKE_SIM_VALUES = (
     CI_SMOKE_APP_VALUE,
     "LINK_TYPE=ld2_all_sram",
-    "SOC_SIM_TIME=1800",
+    # The merged HP subsystem roughly doubled the hosted Verilator runtime of
+    # this acceptance step; keep the next existing budget tier.
+    "SOC_SIM_TIME=3600",
     *CI_SMOKE_VERILATOR_VALUES,
 )
 CI_SMOKE_SDRAM_SIM_VALUES = (