Add ReputationRadar community contribution (demo replaced by link)

community-contributions/Reputation_Radar/samples/reddit_sample.json

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+[
+  {
+    "source": "reddit",
+    "id": "t3_sample1",
+    "url": "https://www.reddit.com/r/technology/comments/sample1",
+    "author": "techfan42",
+    "timestamp": "2025-01-15T14:30:00+00:00",
+    "text": "ReputationRadar did an impressive job resolving our customer issues within hours. Support has been world class!",
+    "meta": {"score": 128, "num_comments": 24, "subreddit": "technology", "type": "submission"}
+  },
+  {
+    "source": "reddit",
+    "id": "t1_sample2",
+    "url": "https://www.reddit.com/r/startups/comments/sample2/comment/sample",
+    "author": "growthguru",
+    "timestamp": "2025-01-14T10:10:00+00:00",
+    "text": "Noticed a spike in downtime alerts with ReputationRadar this week. Anyone else seeing false positives?",
+    "meta": {"score": 45, "subreddit": "startups", "type": "comment", "submission_title": "Monitoring tools"}
+  }
+]

community-contributions/Reputation_Radar/samples/trustpilot_sample.json

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+[
+  {
+    "source": "trustpilot",
+    "id": "trustpilot-001",
+    "url": "https://www.trustpilot.com/review/reputationradar.ai",
+    "author": "Dana",
+    "timestamp": "2025-01-12T11:00:00+00:00",
+    "text": "ReputationRadar has simplified our weekly reporting. The sentiment breakdowns are easy to understand and accurate.",
+    "meta": {"rating": "5 stars"}
+  },
+  {
+    "source": "trustpilot",
+    "id": "trustpilot-002",
+    "url": "https://www.trustpilot.com/review/reputationradar.ai?page=2",
+    "author": "Liam",
+    "timestamp": "2025-01-10T18:20:00+00:00",
+    "text": "Support was responsive, but the Trustpilot integration kept timing out. Hoping for a fix soon.",
+    "meta": {"rating": "3 stars"}
+  }
+]

community-contributions/Reputation_Radar/samples/twitter_sample.json

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+[
+  {
+    "source": "twitter",
+    "id": "173654001",
+    "url": "https://twitter.com/brandlover/status/173654001",
+    "author": "brandlover",
+    "timestamp": "2025-01-15T16:45:00+00:00",
+    "text": "Huge shoutout to ReputationRadar for flagging sentiment risks ahead of our launch. Saved us hours this morning!",
+    "meta": {"likes": 57, "retweets": 8, "replies": 3, "quote_count": 2}
+  },
+  {
+    "source": "twitter",
+    "id": "173653991",
+    "url": "https://twitter.com/critique/status/173653991",
+    "author": "critique",
+    "timestamp": "2025-01-13T09:12:00+00:00",
+    "text": "The new ReputationRadar dashboard feels laggy and the PDF export failed twice. Dev team please check your rollout.",
+    "meta": {"likes": 14, "retweets": 1, "replies": 5, "quote_count": 0}
+  }
+]