Import 9 alphaear finance skills

- alphaear-deepear-lite: DeepEar Lite API integration
- alphaear-logic-visualizer: Draw.io XML finance diagrams
- alphaear-news: Real-time finance news (10+ sources)
- alphaear-predictor: Kronos time-series forecasting
- alphaear-reporter: Professional financial reports
- alphaear-search: Web search + local RAG
- alphaear-sentiment: FinBERT/LLM sentiment analysis
- alphaear-signal-tracker: Signal evolution tracking
- alphaear-stock: A-Share/HK/US stock data

Updates:
- All scripts updated to use universal .env path
- Added JINA_API_KEY, LLM_*, DEEPSEEK_API_KEY to .env.example
- Updated load_dotenv() to use ~/.config/opencode/.env

skills/alphaear-signal-tracker/scripts/utils/logging_setup.py

@@ -0,0 +1,45 @@
+import os
+import sys
+from datetime import datetime
+from typing import Optional
+
+from loguru import logger
+
+
+def setup_file_logging(
+    run_id: str,
+    log_dir: str = "logs",
+    level: str = "INFO",
+    retention: str = "10 days",
+    rotation: str = "20 MB",
+) -> str:
+    """Configure Loguru to log to stderr + a per-run file.
+
+    Returns the log file path.
+    """
+    os.makedirs(log_dir, exist_ok=True)
+
+    # Remove default handler to avoid duplicate logs.
+    logger.remove()
+
+    # Console
+    logger.add(sys.stderr, level=level, backtrace=False, diagnose=False)
+
+    # File (safe for multi-thread via enqueue)
+    log_path = os.path.join(log_dir, f"signalflux_{run_id}.log")
+    logger.add(
+        log_path,
+        level=level,
+        rotation=rotation,
+        retention=retention,
+        enqueue=True,
+        backtrace=True,
+        diagnose=False,
+        encoding="utf-8",
+    )
+    return log_path
+
+
+def make_run_id(prefix: Optional[str] = None) -> str:
+    ts = datetime.now().strftime("%Y%m%d_%H%M%S")
+    return f"{prefix}_{ts}" if prefix else ts