feat: implement resilience module (retry, circuit breaker, timeout)

Add retry_async decorator with exponential backoff + jitter,
CircuitBreaker class with closed/open/half_open states, and
async_timeout context manager. Pin all shared deps with upper bounds.

1 files changed, 14 insertions, 19 deletions

diff --git a/shared/pyproject.toml b/shared/pyproject.toml
index 830088d..dcddc84 100644
--- a/shared/pyproject.toml
+++ b/shared/pyproject.toml
@@ -4,28 +4,23 @@ version = "0.1.0"
 description = "Shared models, events, and utilities for trading platform"
 requires-python = ">=3.12"
 dependencies = [
-    "pydantic>=2.0",
-    "pydantic-settings>=2.0",
-    "redis>=5.0",
-    "asyncpg>=0.29",
-    "sqlalchemy[asyncio]>=2.0",
-    "alembic>=1.13",
-    "structlog>=24.0",
-    "prometheus-client>=0.20",
-    "pyyaml>=6.0",
-    "aiohttp>=3.9",
-    "rich>=13.0",
+    "pydantic>=2.8,<3",
+    "pydantic-settings>=2.0,<3",
+    "redis>=5.0,<6",
+    "asyncpg>=0.29,<1",
+    "sqlalchemy[asyncio]>=2.0,<3",
+    "alembic>=1.13,<2",
+    "structlog>=24.0,<25",
+    "prometheus-client>=0.20,<1",
+    "pyyaml>=6.0,<7",
+    "aiohttp>=3.9,<4",
+    "rich>=13.0,<14",
+    "tenacity>=8.2,<10",
 ]
 
 [project.optional-dependencies]
-dev = [
-    "pytest>=8.0",
-    "pytest-asyncio>=0.23",
-    "ruff>=0.4",
-]
-claude = [
-    "anthropic>=0.40",
-]
+dev = ["pytest>=8.0,<9", "pytest-asyncio>=0.23,<1", "ruff>=0.4,<1"]
+claude = ["anthropic>=0.40,<1"]
 
 [build-system]
 requires = ["hatchling"]