Ajoute la portee per-server pour les votes en attente + credits/licence

pending-votes.scope (config.properties Velocity) = global (defaut,
comportement historique) ou per-server. En per-server, un vote hors
ligne incremente le compteur de chaque serveur de direct-vote.servers
independamment (nouvelle table nb_votes_attente_serveur) ; /claim sur
un serveur ne remet a 0 que ce serveur-la. Necessite server-name
(config.yml) et storage.pending-votes-scope assortis cote Spigot.

Ajoute LICENSE (MIT) et credit Sar_Tron (plugin.yml, @Plugin Velocity,
pom parent, README) en vue de la publication publique.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Sar_Tron
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.