feat(sentiment): add trade asset aliases & known entities; add Glassnode/WSJ RSS sources

- Added 15 trade assets (ZIL, ONG, ONE, STX, ALGO, DASH, LTC, FET, XTZ, ENJ, XLM, ETC, TRX) to asset_aliases.yaml
- Added same assets with metadata to known_entities.yaml (chain, type, market_cap_rank)
- Added Glassnode Insights (0.85 cred) and WSJ Crypto (0.85 cred) to sources.yaml
- Trade log analysis shows these small-caps had zero news coverage - aliases enable entity extraction

sentiment_engine/config/sources.yaml

@@ -194,7 +194,29 @@ sources:
       feed_urls: ["https://www.cftc.gov/PressRoom/PressReleases/rss.xml"]
       max_items_per_feed: 100
 
-  # Corporate
+  # On-chain / Research
+  - source_id: "rss:glassnode"
+    type: "rss"
+    url: "https://insights.glassnode.com/rss/"
+    cadence_seconds: 300
+    base_credibility: 0.85
+    relevance: 0.9
+    extra_config:
+      feed_urls: ["https://insights.glassnode.com/rss/"]
+      max_items_per_feed: 50
+
+  # Traditional finance
+  - source_id: "rss:wsj_crypto"
+    type: "rss"
+    url: "https://feeds.a.dj.com/rss/RSSMarketsMain.xml"
+    cadence_seconds: 300
+    base_credibility: 0.85
+    relevance: 0.7
+    extra_config:
+      feed_urls: ["https://feeds.a.dj.com/rss/RSSMarketsMain.xml"]
+      max_items_per_feed: 50
+
+# Corporate
   - source_id: "corporate:earnings"
     type: "corporate"
     url: "https://seekingalpha.com/api/sa/combined/feed"