feat: Initial Docusaurus setup with Stock Market Professional docs

- Set up Docusaurus with pnpm and TypeScript
- Structured docs for multi-application portfolio
- Added Stock Market Professional documentation:
  - Architecture & system design
  - Data monitoring module
  - Technical analysis engine
  - Signal generation with constraints (max 3/day, 30min hold)
- Added platform architecture overview
- Added getting started guide
- Added Gitea Actions CI/CD pipeline (build + artifact)

docs/applications/stock-market-professional/data-monitoring/index.md

@@ -0,0 +1,72 @@
+---
+sidebar_position: 2
+---
+
+# Data Monitoring
+
+## Overview
+
+The data monitoring module is responsible for acquiring, normalizing, and storing market data that feeds into the analysis engine.
+
+## Requirements
+
+- **Latency**: Near real-time (< 1 minute delay)
+- **Coverage**: Forex major pairs + selected stocks/indices
+- **Granularity**: 1-minute candles, tick data where available
+- **History**: Minimum 30 days rolling window for backtesting
+- **Reliability**: Automatic reconnection, data gap detection
+
+## Watched Instruments
+
+### Forex Pairs (Initial)
+| Pair | Session | Notes |
+|---|---|---|
+| EUR/USD | London + NY | Most liquid, tight spreads |
+| GBP/USD | London + NY | High volatility windows |
+| USD/JPY | Tokyo + London | Trend-following opportunities |
+| AUD/USD | Sydney + London | Commodity correlation |
+
+### Indices (Future)
+| Index | Session | Notes |
+|---|---|---|
+| S&P 500 (SPX) | NY | Broad market sentiment |
+| NASDAQ 100 (NDX) | NY | Tech sector proxy |
+
+## Data Pipeline
+
+```
+┌──────────────┐     ┌──────────────┐     ┌──────────────┐
+│  API Source  │────▶│  Normalizer  │────▶│   Storage    │
+│              │     │              │     │              │
+│ • REST poll  │     │ • OHLCV fmt  │     │ • SQLite/TS  │
+│ • WebSocket  │     │ • Timestamps │     │ • Partitioned│
+│ • Fallback   │     │ • Validation │     │ • Indexed    │
+└──────────────┘     └──────────────┘     └──────────────┘
+```
+
+## Data Schema
+
+```sql
+CREATE TABLE candles (
+    id INTEGER PRIMARY KEY,
+    symbol TEXT NOT NULL,
+    timeframe TEXT NOT NULL,  -- '1m', '5m', '15m', '1h'
+    timestamp DATETIME NOT NULL,
+    open REAL NOT NULL,
+    high REAL NOT NULL,
+    low REAL NOT NULL,
+    close REAL NOT NULL,
+    volume REAL,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(symbol, timeframe, timestamp)
+);
+
+CREATE INDEX idx_candles_symbol_time ON candles(symbol, timeframe, timestamp DESC);
+```
+
+## Health Checks
+
+- Data freshness monitoring (alert if > 5 min stale)
+- Gap detection and backfill
+- Source failover (primary → secondary API)
+- Rate limit tracking per API key