Function comments with backslashes modified on save+load #8686

Version and Platform (required):

• Binary Ninja Version: 6.1.10984-dev (7c2dfd74)
• Edition: Commercial
• OS: macOS
• OS Version: 27.0.1 (26A434)
• CPU Architecture: arm64

Bug Description:
When saving and loading a bndb, function comments get modified: text that looks like a backslash escape gets unescaped.

Steps To Reproduce:

1. Open any binary
2. Create a function comment (not applicable to other comments) with the text:
   foo:\\n bar:\n asdf
   -> At first the comment appears exactly as written (correctly).
3. Save the bndb, close, and reopen.
   -> Now \n has been turned into a newline and \\n has been turned into \n.
4. Save the bndb, close, and reopen.
   -> Now there are two newlines.

Expected Behavior:
Saving and loading shouldn't modify any state.