Count only completed games in player leaderboards

docs/leaderboard.md

@@ -5,9 +5,11 @@ with one entry per GUID combining Black Ops I (T5) and Black Ops II (T6). Game
 and map filters limit which matches contribute to each player's statistics and
 rank. Choose a ranking, search a name or GUID, and share the page URL with its
 filters intact. Results refresh while the page is visible.
-Matches only appear in server/global history and leaderboard map options once
-they reach round 2. Player records only contribute to leaderboards, summaries,
-profiles and player history once that player is observed at round 2 or later.
+Matches only appear in server/global history once they reach round 2.
+Leaderboards, summaries, map options, profiles and player history include only
+completed matches with a received `game_end`. Active and interrupted matches do
+not contribute. A player must also be observed at round 2 or later; players who
+left before a completed game's end retain their recorded stats.
 This also excludes existing round 1 records. Early telemetry is retained so
 qualifying games keep their start time, roster and cumulative counters.
 
@@ -32,7 +34,7 @@ score are the highest reported values within the match, not necessarily its fina
 scoreboard. Active and interrupted matches remain listed without results links.
 Match pages remain available after the original server is removed.
 
-The leaderboard uses the existing three telemetry events; no reporter change is
+The leaderboard uses the existing telemetry events; no reporter change is
 required. The leaderboard and profiles identify a player by **GUID**, displaying
 the latest reported name across both games, regardless of game or map filters.
 Different names for the same GUID do not split their leaderboard entry or
@@ -47,7 +49,7 @@ leaderboard and profiles require no storage migration. GUIDs stay strings.
 | Highest round | Highest round reported with that player present, including players who joined mid-game. |
 | Total kills, headshots, revives, downs | Sum of each player's highest reported counter in each game. Round snapshots are cumulative, so they are never added together within a game. |
 | Total rounds | Round progression during observed participation, added across games. A player observed at game start and then round 8 receives seven rounds. A player first seen at round 8 gets a highest-round record of 8, but zero total rounds; reaching round 9 then adds one. |
-| Games played | Games in which a stats report at round 2 or later contains the player. Start-only and round 1 participation do not count. |
+| Games played | Completed games in which a stats report at round 2 or later contains the player, even if they left before the end. Start-only and round 1 participation do not count. |
 | Games completed | Games whose `game_end` roster contains the player. Disconnected players retain earlier stats without receiving completion credit. |
 | Best game kills | Highest kill count recorded in any one game. |
 | Highest reported score | Highest observed score balance. Spending points can lower the score, so this is not cumulative points earned. |
@@ -59,8 +61,8 @@ across both games when unfiltered. Summary cards describe the same selection,
 regardless of the search text. Player counts include each qualifying GUID once,
 including when they have records in both games. Summary rounds are
 player-rounds: four players progressing from game start to round 8 contribute 28.
-Highest-round records always use the round reached, including the final round
-and players who joined mid-game.
+Highest-round records always use the round reached in a completed match,
+including the final round and players who joined mid-game.
 
 Round totals require the player to appear in consecutive observations. If a
 report omits them, their return starts a new participation interval and the gap