Update to Stan 2.38.0 (#309)

* Bump stan from `1357c13` to `3bf5673`

Bumps [stan](https://github.com/stan-dev/stan) from `1357c13` to `3bf5673`.
- [Release notes](https://github.com/stan-dev/stan/releases)
- [Commits](stan-dev/stan@1357c13...3bf5673)

---
updated-dependencies:
- dependency-name: stan
  dependency-version: 3bf56735b3936b75961ebea5382e72d6354119d5
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update README and Makefile

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Brian Ward <bward@flatironinstitute.org>

Author: dependabot[bot]

Makefile

@@ -18,8 +18,11 @@ include $(MATH)make/compiler_flags
 include $(MATH)make/libraries
 
 # Set -fPIC globally since we're always building a shared library
-override CXXFLAGS += -fPIC -fvisibility=hidden -fvisibility-inlines-hidden
+override CXXFLAGS += -fPIC
 override CXXFLAGS_SUNDIALS += -fPIC
+
+# visibility control
+override CXXFLAGS += -fvisibility=hidden -fvisibility-inlines-hidden
 override CPPFLAGS += -DBRIDGESTAN_EXPORT -DSTAN_OVERRIDE_EIGEN_ASSERT
 
 ifdef STAN_OPENCL
@@ -141,7 +144,7 @@ print-%  : ; @echo $* = $($*) ;
 STANC_DL_RETRY = 5
 STANC_DL_DELAY = 10
 STANC3_TEST_BIN_URL ?=
-STANC3_VERSION ?= v2.37.0
+STANC3_VERSION ?= v2.38.0
 
 ifeq ($(OS),Windows_NT)
  OS_TAG := windows

README.md

@@ -17,7 +17,7 @@ Stan is a probabilistic programming language for coding statistical
 models.  For an introduction to what can be coded in Stan, see the
 [*Stan User's Guide*](https://mc-stan.org/docs/stan-users-guide/index.html).
 
-BridgeStan is currently shipping with Stan version 2.37.0
+BridgeStan is currently shipping with Stan version 2.38.0
 
 Documentation is available at https://roualdes.us/bridgestan/
 
@@ -106,6 +106,8 @@ We are aware of the following projects using BridgeStan.
 
 - https://github.com/xhep-lab/polystan
 
+<!-- https://github.com/search?q=bridgestan+NOT+repo%3Aroualdes%2Fbridgestan+NOT+is%3Afork&type=code -->
+
 ## Research using BridgeStan
 
 If you use BridgeStan in your research, please consider citing [our JOSS paper](https://joss.theoj.org/papers/10.21105/joss.05236)
@@ -118,6 +120,11 @@ and letting us know so we can list your project here.
 - [*Variational Inference in Location-Scale Families: Exact Recovery of the Mean and Correlation Matrix*](https://arxiv.org/abs/2410.11067)
 - [*Sampling From Multiscale Densities With Delayed Rejection Generalized Hamiltonian Monte Carlo*](https://arxiv.org/abs/2406.02741)
 - [*MCBench: A Benchmark Suite for Monte Carlo Sampling Algorithms*](https://arxiv.org/abs/2501.03138)
+- [*Efficient scenario analysis in real-time Bayesian election forecasting via sequential meta-posterior sampling*](https://arxiv.org/abs/2510.19133)
+- [*Fisher meets Feynman: score-based variational inference with a product of experts*](https://arxiv.org/abs/2510.21598)
+- [*Generalized Guarantees for Variational Inference in the Presence of Even and Elliptical Symmetry*](https://arxiv.org/abs/2511.01064)
+
+<!-- https://search.arxiv.org/?query=bridgestan&byDate=1 -->
 
 ## Acknowledgements