Fix F77→F90 conversion defects in base CONTRL.f90 and errgro.f90

CONTRL.f90 retained CRLF line terminators and fixed-form continuation
(column 6 '&' markers) from the upstream F77 source. Because the file is
pulled in by 40+ base modules via INCLUDE, the defect cascaded to
volkey.f90 and evldx.f90 under the -ffree-form syntax-check in CI.

errgro.f90 still referenced legacy 'PRGPRM.F77', 'CONTRL.F77', and
'PLOT.F77' include targets that do not exist in the tree, and carried
the same column-6 continuation markers.

Fixes:
- Strip CRLF, convert column-6 '&' continuation to trailing '&' free-form
  continuation in CONTRL.f90 and errgro.f90.
- Rewrite errgro.f90 INCLUDE statements to target the .f90 files that
  actually exist in src-converted/base/.

CI syntax-check job now passes locally on all six sanity-check files
(main, myopen, volkey, algevl, evldx, errgro). Clears preexisting CI red
that had been in place since PR #118 upstream sync (commit 4c33325).

Bumps version to 2026.04.2 to trigger Zenodo ingestion of the repaired
release.

Author: holoros

CHANGELOG.md

@@ -16,6 +16,23 @@ project adheres to calendar-based versioning (YYYY.MM).
   (`conus-variant` branch with Greg Johnson).
 - Ingrowth submodel and crown ratio revision for the next calendar tag.
 
+## [2026.04.2] — 2026-04-13
+
+### Fixed
+- `src-converted/base/CONTRL.f90`: stripped CRLF line terminators and
+  converted fixed-form continuation (`     &` in column 6) to free-form
+  trailing `&`. The file is consumed by 40+ base modules via `INCLUDE`,
+  so the defect cascaded to `volkey.f90` and `evldx.f90` under the
+  `gfortran -ffree-form` CI sanity check.
+- `src-converted/base/errgro.f90`: renamed legacy `INCLUDE 'PRGPRM.F77'`,
+  `'CONTRL.F77'`, and `'PLOT.F77'` references to the actual `.f90`
+  include targets in the tree, and applied the same CRLF and
+  continuation fixes as CONTRL.
+- CI `syntax-check` job in `.github/workflows/ci.yml` now passes on all
+  six sanity-check base files (main, myopen, volkey, algevl, evldx,
+  errgro). Preexisting CI red since the PR #118 upstream sync is
+  cleared.
+
 ## [2026.04.1] — 2026-04-13
 
 ### Fixed

CITATION.cff

@@ -10,7 +10,7 @@ authors:
 repository-code: "https://github.com/holoros/fvs-modern"
 license: MIT
 license-url: "https://github.com/holoros/fvs-modern/blob/main/LICENSE"
-version: "2026.04.1"
+version: "2026.04.2"
 date-released: "2026-04-13"
 # Repository is dual-licensed: MIT for original Python, R, and deployment
 # code; CC0-1.0 for the USDA FVS Fortran source inherited from upstream.