DOC: SKIP_LINTING and deleted Property copy constructor.

README_SETUP.md

@@ -77,6 +77,8 @@ For the tests there is a slightly different setup required (with option `-D CMAK
 1. `mkdir build && cd build/`
 2. `conan install .. -s "compiler.libcxx=libstdc++11"`
 3. `cmake -B . -D CMAKE_BUILD_TYPE=Debug ..`
+   * If your clang-format version is too old, formatting, linting etc. can be skipped:  
+     `cmake -B . -D CMAKE_BUILD_TYPE=Debug -D SKIP_LINTING=ON ..`
 4. `cmake --build .`
 
 ### Run

include/caosdb/entity.h

@@ -558,6 +558,16 @@ private:
  * Container for Properties of Entities.
  *
  * Should only be instantiated and write-accessed by the owning entity.
+ *
+ * Note that iterating over the Property contents only works via references, since the Property copy
+ * constructor is deliberately disabled:
+ *
+ * \code
+ * // Accessing single properties as reference
+ * auto &property = my_properties.at(0);
+ * // Iterating via reference
+ * for (auto &property : my_properties) {...}
+ * \endcode
  */
 class Properties
   : public RepeatedPtrFieldWrapper<Property,