feat: initial trading platform implementation

Binance spot crypto trading platform with microservices architecture:
- shared: Pydantic models, Redis Streams broker, asyncpg DB layer
- data-collector: Binance WebSocket/REST market data collection
- strategy-engine: Plugin-based strategy execution (RSI, Grid)
- order-executor: Order execution with risk management
- portfolio-manager: Position tracking and PnL calculation
- backtester: Historical strategy testing with simulator
- cli: Click-based CLI for all operations
- Docker Compose orchestration with Redis and PostgreSQL
- 24 test files covering all modules

1 files changed, 36 insertions, 0 deletions

diff --git a/services/strategy-engine/src/strategy_engine/plugin_loader.py b/services/strategy-engine/src/strategy_engine/plugin_loader.py
new file mode 100644
index 0000000..719dc6d
--- /dev/null
+++ b/services/strategy-engine/src/strategy_engine/plugin_loader.py
@@ -0,0 +1,36 @@
+"""Dynamic plugin loader for strategy modules."""
+import importlib.util
+import sys
+from pathlib import Path
+
+from strategies.base import BaseStrategy
+
+
+def load_strategies(strategies_dir: Path) -> list[BaseStrategy]:
+    """Scan strategies_dir for *.py files and load all BaseStrategy subclasses."""
+    loaded: list[BaseStrategy] = []
+
+    for path in sorted(strategies_dir.glob("*.py")):
+        # Skip dunder files and base
+        if path.name.startswith("__") or path.name == "base.py":
+            continue
+
+        module_name = f"_strategy_plugin_{path.stem}"
+        spec = importlib.util.spec_from_file_location(module_name, path)
+        if spec is None or spec.loader is None:
+            continue
+
+        module = importlib.util.module_from_spec(spec)
+        sys.modules[module_name] = module
+        spec.loader.exec_module(module)
+
+        for attr_name in dir(module):
+            obj = getattr(module, attr_name)
+            if (
+                isinstance(obj, type)
+                and issubclass(obj, BaseStrategy)
+                and obj is not BaseStrategy
+            ):
+                loaded.append(obj())
+
+    return loaded