style: auto-fix lint violations from enhanced ruff rules

7 files changed, 18 insertions, 21 deletions

diff --git a/services/news-collector/src/news_collector/collectors/fear_greed.py b/services/news-collector/src/news_collector/collectors/fear_greed.py
index f79f716..42e8f88 100644
--- a/services/news-collector/src/news_collector/collectors/fear_greed.py
+++ b/services/news-collector/src/news_collector/collectors/fear_greed.py
@@ -2,7 +2,6 @@
 
 import logging
 from dataclasses import dataclass
-from typing import Optional
 
 import aiohttp
 
@@ -26,7 +25,7 @@ class FearGreedCollector(BaseCollector):
     async def is_available(self) -> bool:
         return True
 
-    async def _fetch_index(self) -> Optional[dict]:
+    async def _fetch_index(self) -> dict | None:
         headers = {"User-Agent": "Mozilla/5.0"}
         try:
             async with aiohttp.ClientSession() as session:
@@ -50,7 +49,7 @@ class FearGreedCollector(BaseCollector):
             return "Greed"
         return "Extreme Greed"
 
-    async def collect(self) -> Optional[FearGreedResult]:
+    async def collect(self) -> FearGreedResult | None:
         data = await self._fetch_index()
         if data is None:
             return None
diff --git a/services/news-collector/src/news_collector/collectors/fed.py b/services/news-collector/src/news_collector/collectors/fed.py
index fce4842..52128e5 100644
--- a/services/news-collector/src/news_collector/collectors/fed.py
+++ b/services/news-collector/src/news_collector/collectors/fed.py
@@ -3,7 +3,7 @@
 import asyncio
 import logging
 from calendar import timegm
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 import feedparser
 from nltk.sentiment.vader import SentimentIntensityAnalyzer
@@ -76,10 +76,10 @@ class FedCollector(BaseCollector):
         if published_parsed:
             try:
                 ts = timegm(published_parsed)
-                return datetime.fromtimestamp(ts, tz=timezone.utc)
+                return datetime.fromtimestamp(ts, tz=UTC)
             except Exception:
                 pass
-        return datetime.now(timezone.utc)
+        return datetime.now(UTC)
 
     async def collect(self) -> list[NewsItem]:
         try:
diff --git a/services/news-collector/src/news_collector/collectors/finnhub.py b/services/news-collector/src/news_collector/collectors/finnhub.py
index 13e3602..67cb455 100644
--- a/services/news-collector/src/news_collector/collectors/finnhub.py
+++ b/services/news-collector/src/news_collector/collectors/finnhub.py
@@ -1,7 +1,7 @@
 """Finnhub news collector with VADER sentiment analysis."""
 
 import logging
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 import aiohttp
 from nltk.sentiment.vader import SentimentIntensityAnalyzer
@@ -64,7 +64,7 @@ class FinnhubCollector(BaseCollector):
             sentiment = sentiment_scores["compound"]
 
             ts = article.get("datetime", 0)
-            published_at = datetime.fromtimestamp(ts, tz=timezone.utc)
+            published_at = datetime.fromtimestamp(ts, tz=UTC)
 
             related = article.get("related", "")
             symbols = [t.strip() for t in related.split(",") if t.strip()] if related else []
diff --git a/services/news-collector/src/news_collector/collectors/reddit.py b/services/news-collector/src/news_collector/collectors/reddit.py
index 226a2f9..4e9d6f5 100644
--- a/services/news-collector/src/news_collector/collectors/reddit.py
+++ b/services/news-collector/src/news_collector/collectors/reddit.py
@@ -2,7 +2,7 @@
 
 import logging
 import re
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 import aiohttp
 from nltk.sentiment.vader import SentimentIntensityAnalyzer
@@ -78,7 +78,7 @@ class RedditCollector(BaseCollector):
                 symbols = list(dict.fromkeys(_TICKER_PATTERN.findall(combined)))
 
                 created_utc = post_data.get("created_utc", 0)
-                published_at = datetime.fromtimestamp(created_utc, tz=timezone.utc)
+                published_at = datetime.fromtimestamp(created_utc, tz=UTC)
 
                 items.append(
                     NewsItem(
diff --git a/services/news-collector/src/news_collector/collectors/rss.py b/services/news-collector/src/news_collector/collectors/rss.py
index ddf8503..bca0e9f 100644
--- a/services/news-collector/src/news_collector/collectors/rss.py
+++ b/services/news-collector/src/news_collector/collectors/rss.py
@@ -3,7 +3,7 @@
 import asyncio
 import logging
 import re
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from time import mktime
 
 import feedparser
@@ -56,10 +56,10 @@ class RSSCollector(BaseCollector):
         if parsed_time:
             try:
                 ts = mktime(parsed_time)
-                return datetime.fromtimestamp(ts, tz=timezone.utc)
+                return datetime.fromtimestamp(ts, tz=UTC)
             except Exception:
                 pass
-        return datetime.now(timezone.utc)
+        return datetime.now(UTC)
 
     async def collect(self) -> list[NewsItem]:
         try:
diff --git a/services/news-collector/src/news_collector/collectors/sec_edgar.py b/services/news-collector/src/news_collector/collectors/sec_edgar.py
index ca1d070..d88518f 100644
--- a/services/news-collector/src/news_collector/collectors/sec_edgar.py
+++ b/services/news-collector/src/news_collector/collectors/sec_edgar.py
@@ -1,13 +1,13 @@
 """SEC EDGAR filing collector (free, no API key required)."""
 
 import logging
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 import aiohttp
 from nltk.sentiment.vader import SentimentIntensityAnalyzer
 
-from shared.models import NewsCategory, NewsItem
 from news_collector.collectors.base import BaseCollector
+from shared.models import NewsCategory, NewsItem
 
 logger = logging.getLogger(__name__)
 
@@ -58,7 +58,7 @@ class SecEdgarCollector(BaseCollector):
     async def collect(self) -> list[NewsItem]:
         filings_data = await self._fetch_recent_filings()
         items = []
-        today = datetime.now(timezone.utc).strftime("%Y-%m-%d")
+        today = datetime.now(UTC).strftime("%Y-%m-%d")
 
         for company_data in filings_data:
             tickers = [t["ticker"] for t in company_data.get("tickers", [])]
@@ -87,9 +87,7 @@ class SecEdgarCollector(BaseCollector):
                         headline=headline,
                         summary=desc,
                         url=f"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&accession={accession}",
-                        published_at=datetime.strptime(filing_date, "%Y-%m-%d").replace(
-                            tzinfo=timezone.utc
-                        ),
+                        published_at=datetime.strptime(filing_date, "%Y-%m-%d").replace(tzinfo=UTC),
                         symbols=tickers,
                         sentiment=self._vader.polarity_scores(headline)["compound"],
                         category=NewsCategory.FILING,
diff --git a/services/news-collector/src/news_collector/collectors/truth_social.py b/services/news-collector/src/news_collector/collectors/truth_social.py
index 33ebc86..e2acd88 100644
--- a/services/news-collector/src/news_collector/collectors/truth_social.py
+++ b/services/news-collector/src/news_collector/collectors/truth_social.py
@@ -2,7 +2,7 @@
 
 import logging
 import re
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 import aiohttp
 from nltk.sentiment.vader import SentimentIntensityAnalyzer
@@ -67,7 +67,7 @@ class TruthSocialCollector(BaseCollector):
             try:
                 published_at = datetime.fromisoformat(created_at_str.replace("Z", "+00:00"))
             except Exception:
-                published_at = datetime.now(timezone.utc)
+                published_at = datetime.now(UTC)
 
             items.append(
                 NewsItem(