feat: add Python 3.14 support

Widen Python version constraint from <3.14 to <3.15 and bump redisvl
minimum from 0.11.0 to 0.14.0, which supports Python 3.14.

- Update python constraint to >=3.10,<3.15
- Bump redisvl to >=0.14.0,<1.0.0
- Add Python 3.14 classifier and black target
- Fix semantic cache test that used distance_threshold=0.95
  (was incorrectly treating distance as similarity score)

Closes #148

Author: bsbodden

poetry.lock

@@ -12,14 +12,15 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "License :: OSI Approved :: MIT License",
 ]
 packages = [{ include = "langgraph" }]
 
 [tool.poetry.dependencies]
-python = ">=3.10,<3.14"
+python = ">=3.10,<3.15"
 langgraph-checkpoint = ">=3.0.0,<5.0.0"
-redisvl = ">=0.11.0,<1.0.0"
+redisvl = ">=0.14.0,<1.0.0"
 redis = ">=5.2.1"
 orjson = "^3.9.0"
 tomli = { version = "^2.0.1", python = "<3.11" }
@@ -83,7 +84,7 @@ requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.black]
-target-version = ['py310', 'py311', 'py312', 'py313']
+target-version = ['py310', 'py311', 'py312', 'py313', 'py314']
 exclude = '''
 (
   | \.egg

pyproject.toml

@@ -85,7 +85,7 @@ async def test_different_prompts_not_cached(self, redis_url: str) -> None:
         config = SemanticCacheConfig(
             redis_url=redis_url,
             name="test_llm_cache_diff",
-            distance_threshold=0.95,  # High similarity threshold - only near-exact matches
+            distance_threshold=0.05,  # Low distance threshold - only near-exact matches
             ttl_seconds=60,
         )