feat: ticker symbol voting for live votes

- Add ticker column to games table with migration
- Bootstrap tickers from tickers.json config on startup
- POST /api/votes/live accepts optional ticker field for direct game
  lookup (bypasses timestamp-interval matching)
- Ticker votes work for any game, not just session games
- Update API docs and add e2e tests for ticker voting
- Version bump to 0.6.5

Made-with: Cursor

backend/config/tickers.json

@@ -0,0 +1,60 @@
+{
+  "QPL3": "Quiplash 3",
+  "QPL2": "Quiplash 2",
+  "QLXL": "Quiplash XL",
+  "FBXL": "Fibbage XL",
+  "FBG2": "Fibbage 2",
+  "FBG3": "Fibbage 3",
+  "FBG4": "Fibbage 4",
+  "TMP1": "Trivia Murder Party",
+  "TMP2": "Trivia Murder Party 2",
+  "DRWF": "Drawful",
+  "DRWA": "Drawful Animate",
+  "DD": "Dirty Drawful",
+  "DOOM": "Doominate",
+  "JJ": "Job Job",
+  "TKO2": "Tee K.O. 2",
+  "TKOX": "Tee K.O. T-Shirt Knock Out",
+  "CU": "Champ'd Up",
+  "BR": "Blather 'Round",
+  "STR": "Split the Room",
+  "ROOM": "Roomerang",
+  "BRKT": "Bracketeering",
+  "NNSR": "Nonsensory",
+  "QXRT": "Quixort",
+  "JNKT": "Junktopia",
+  "TP": "Talking Points",
+  "PS": "Patently Stupid",
+  "PTB": "Push the Button",
+  "WD": "Weapons Drawn",
+  "HPNT": "Hypnotorious",
+  "DCTN": "Dictionarium",
+  "RM": "Role Models",
+  "JB": "Joke Boat",
+  "GSPN": "Guesspionage",
+  "MVC": "Mad Verse City",
+  "HRSY": "Hear Say",
+  "CH": "Cookie Haus",
+  "SPCT": "Suspectives",
+  "LOT": "Legends of Trivia",
+  "STI": "Survive the Internet",
+  "CVDL": "Civic Doodle",
+  "MSM": "Monster Seeking Monster",
+  "TPM": "The Poll Mine",
+  "TWEP": "The Wheel of Enormous Proportions",
+  "TJ": "Time Jinx",
+  "DRM": "Dodo Re Mi",
+  "FT": "Fixy Text",
+  "SS": "Survey Scramble",
+  "WS": "Word Spud",
+  "LS": "Lie Swatter",
+  "FI": "Fakin' It!",
+  "FANL": "Fakin' It All Night Long",
+  "LMF": "Let Me Finish",
+  "BDTS": "Bidiots",
+  "BC": "Bomb Corp.",
+  "YDK1": "You Don't Know Jack\u00ae 2015",
+  "YDKJ": "You Don't Know Jack\u00ae Full Stream",
+  "ZPDM": "Zeeple Dome",
+  "EW": "Earwax\u2122"
+}