DEPS: make boost bdep (not rdep)

conanfile.py

@@ -14,10 +14,10 @@ class CaosdbConan(ConanFile):
     default_options = {"shared": False, "fPIC": True}
     generators = "cmake"
     requires = [
-        ("boost/1.77.0"),
         ("grpc/1.39.1"),
     ]
     build_requires = [
+        ("boost/1.77.0"),
         ("gtest/1.11.0"),
     ]
     exports = ("*.cmake", "*CMakeLists.txt", "*.in",

doc/CHANGELOG.md

@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+* Removed boost from the headers. Boost is only a build dependency from now on.
+
 ### Deprecated
 
 ### Removed