Add horoscope, !time @user, profile achievements; fix mention detection and multiple bugs

- Add !horoscope command and daily horoscope digest using Free Horoscope API
- Enhance !time to support @user timezone lookups
- Add profile completeness achievements (birthday, timezone, both set)
- Fix Matrix mention detection in reputation and LLM passive plugins
- Fix !whois reputation query (reason string mismatch and calculation)
- Fix !time IANA case-sensitivity and username/city collision
- Fix timezone default to empty string for achievement detection
- Scope all leaderboards to room members (XP, rep, potty, insult, first, rankings, emoji)
- Fix XP rank calculation to handle tied scores correctly
- Replace skull emoji with bomb for bot insult reactions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.env.example

@@ -23,6 +23,7 @@ OPENWEATHER_API_KEY=
 FINNHUB_API_KEY=
 BANDSINTOWN_API_KEY=
 TMDB_API_KEY=
+SERPAPI_KEY=              # SerpAPI key for image fetching (esteemed members)
 
 # ---- Self-Hosted Services (optional) ----
 LIBRETRANSLATE_URL=
@@ -34,6 +35,8 @@ LLM_SAMPLE_RATE=0.15  # 0.0-1.0, fraction of non-keyword messages to classify (1
 FEATURE_URL_PREVIEW=
 FEATURE_SHADE=
 FEATURE_TRIVIA=true  # set to "false" to disable trivia
+FEATURE_ESTEEMED=    # set to anything to enable satirical esteemed member posts
+ESTEEMED_ROOM=       # room ID for esteemed member posts (separate from broadcast rooms)
 
 # ---- Missing Members (!haveyouseenthem / !missing) ----
 MISSING_THRESHOLD_DAYS=14     # days of inactivity before considered missing