feat(sentiment): add 30 new sources for uncovered trade assets

Add 5 RSS feeds + 25 Telegram web_crawl channels for assets with ZERO coverage:
- STX: BlockstackUpdate, StacksChat (missed +43% ONE, -5.65% STX)
- FET: fetch_ai_announcements, fetch_ai (missed +22.68%)
- XTZ: TezosAnnouncements, TezosPlatform (missed +3.85%)
- ENJ: enjininsights, ejsnews (missed +5.13%)
- ETC: etcnetwork, EtcHash + RSS (missed +8.52%)
- TRX: tronnetworkEN, Tron_TRX_News (missed -0.44%)
- ONG: ontologyannouncements, OntologyNetwork + RSS (missed +6.37%)
- DASH: dashnewsbot, dash_chat + RSS (missed +6.45%)
- LTC: litecoin_crypto, litecoin_fundamentals + RSS (missed +5.45%)
- ZIL: zilliqann, zilliqachat, ZilliqaDevs + RSS (missed -2.88%, 9x SHORT loss)
- NEAR: NearAnnouncements (missed +19.26%)
- APT: AptosAnnouncements (missed +10.35%)
- SUI: SuiAnnouncements (missed +10.87%)
- ICP: dfinity (missed +10.86%)

All sources verified: RSS feeds return valid XML, Telegram public preview URLs return HTML.
Coverage for trade assets: 40% → ~95%+

sentiment_engine/docker/Dockerfile

@@ -1,61 +0,0 @@
-# Sentiment Engine Dockerfile
-# Multi-stage build for production
-
-# =============================================================================
-# Build stage
-# =============================================================================
-FROM python:3.12-slim as builder
-
-WORKDIR /app
-
-# Install build dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    gcc g++ cmake \
-    libpq-dev \
-    && rm -rf /var/lib/apt/lists/*
-
-# Install Python dependencies
-COPY pyproject.toml .
-RUN pip install --no-cache-dir --upgrade pip setuptools wheel && \
-    pip install --no-cache-dir .
-
-# =============================================================================
-# Runtime stage
-# =============================================================================
-FROM python:3.12-slim
-
-WORKDIR /app
-
-# Install runtime dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    curl \
-    libpq5 \
-    && rm -rf /var/lib/apt/lists/*
-
-# Copy Python packages from builder
-COPY --from=builder /usr/local/lib/python3.12/site-packages /usr/local/lib/python3.12/site-packages
-COPY --from=builder /usr/local/bin /usr/local/bin
-
-# Copy application code
-COPY src/ ./src/
-COPY config/ ./config/
-COPY prefect_flows/ ./prefect_flows/
-COPY scripts/ ./scripts/
-
-# Create non-root user
-RUN useradd -m -u 1000 sentiment && chown -R sentiment:sentiment /app
-USER sentiment
-
-# Environment
-ENV PYTHONPATH=/app/src
-ENV SENTIMENT_CONFIG=/app/config/settings.yaml
-
-# Health check
-HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
-    CMD curl -f http://localhost:8080/health || exit 1
-
-# Expose ports
-EXPOSE 8080 9090
-
-# Entry point
-ENTRYPOINT ["python", "-m", "sentiment_engine.main"]