ci: bump pylcm pin to e4cae2aa (post-#342, post-#340 diagnostic)

The previous pin (6c610d1, "Lock integer dtype to int32 end-to-end")
predates pylcm #342, so the test_initial_conditions_extreme_assets
test (and any other test that solves a benchmark regime carrying the
pension-imputation correction) raised:

    InvalidParamsError: Missing required parameter:
    'retiree_nomc_inelig_canwork__imputed_pension_wealth_next_period__next_aime'

#342's `regime_template` change exempts `next_<state>` references
inside transition signatures from `fixed_param` extraction, which the
correction's `imputed_pension_wealth_next_period(next_aime, ...)`
signature relies on. The new pin tracks `feat/simulate-aot-n-subjects`,
which carries #342, #339, #340 (n_subjects API used by
`create_benchmark_model`), and the per-constraint validation
diagnostic.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hmgaudecker

.github/workflows/main.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Install pylcm (unreleased feature branch required)
         run: >-
           pip install "pylcm @
-          git+https://github.com/OpenSourceEconomics/pylcm.git@6c610d19644d3f524ad112ed16c0621ee2ecd326"
+          git+https://github.com/OpenSourceEconomics/pylcm.git@e4cae2aa57d4bf568b8ebbade55d44571e3a086f"
       - name: Install aca-model with test deps
         run: pip install -e . pytest pdbp
       - name: Run pytest