feat(redis): add native JSON session storage for 4.1.0

- Add opt-in SESSION_REDIS_JSON storage for asyncio Redis backends.
- Check JSON command support at startup and reject JSON mode on Trio.
- Read legacy strings and migrate sessions on their next save.
- Validate JSON objects before transactional replacement and expiry.
- Preserve tagged serialization for datetime, tuple, and other types.
- Cover command contracts, error handling, and session round-trips.
- Document server requirements, permissions, and migration limits.
- Normalize indentation and whitespace across code, tests, and examples.
- Bump the package and lockfile to 4.1.0 and update the changelog.
- Refresh the locked pycparser dependency to 3.12.

quart_session/redis_trio/README.md

@@ -1,5 +1,3 @@
-
-
 Code here is borrowed from [alekseyev/trio-redis](https://github.com/alekseyev/trio-redis), which was originally developed over at [Bogdanp/trio-redis](https://github.com/Bogdanp/trio-redis).
 
 Since it has no active maintainers and no PyPI package - I am including it as-is.
@@ -9,7 +7,7 @@ Since it has no active maintainers and no PyPI package - I am including it as-is
 ```python3
 from quart_session.redis_trio import RedisTrio
 cache = RedisTrio(
-    addr=b"10.0.0.3", port=6379, password=b"foo")
+  addr=b"10.0.0.3", port=6379, password=b"foo")
 await cache.connect()
 
 await cache.setex(key="foo", value=42, seconds=300)
@@ -20,8 +18,8 @@ Or,
 
 ```python3
 async with RedisTrio() as cache:
-    await cache.set("foo", 42)
-    await cache.get("foo")
+  await cache.set("foo", 42)
+  await cache.get("foo")
 ```
 
 ## Future work