Merge develop into claude/fix-issue-3989-db7e45

Resolve the conflict in binary_reader.hpp: develop dropped the
document_size < 0 check in check_bson_document_size(), because sizes below 5
are rejected before they are stored. Here such a size is only stored after it
was repaired, and the !size_repaired guard skips the check, so the check is
dropped here as well. Regenerate the single headers.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasEVkSyiaFoX2FtPpsU

include/nlohmann/detail/string_utils.hpp

@@ -37,7 +37,7 @@ StringType to_string(std::size_t value)
     StringType result;
     int_to_string(result, value);
     return result;
-}
+} // LCOV_EXCL_LINE (exception cleanup only)
 
 /// @return a byte as two uppercase hexadecimal digits
 inline std::string hex_byte(const std::uint8_t byte)
@@ -47,7 +47,7 @@ inline std::string hex_byte(const std::uint8_t byte)
     result[0] = nibble_to_hex[byte / 16];
     result[1] = nibble_to_hex[byte % 16];
     return result;
-}
+} // LCOV_EXCL_LINE (exception cleanup only)
 
 /*!
 @brief write a UTF-16 code unit as four lowercase hexadecimal digits
@@ -391,7 +391,7 @@ inline StringType sanitize_utf8(const StringType& s, const error_handler_t error
     }
 
     return result;
-}
+} // LCOV_EXCL_LINE (exception cleanup only)
 
 }  // namespace detail
 NLOHMANN_JSON_NAMESPACE_END