755 Feature request add senders id to the chat reaction information and update test builders

[CapoMK25]

Brief description

This PR implements the requirement to include the player's unique ID (sender_id) within chat reactions. This ensures the frontend can reliably identify the author of a reaction, consistent with our ChatMessage ownership model.

Change list

• Modified Reaction class in reaction.schema.ts to include sender_id as a required String property.
• Updated ReactionDto and CreateReactionDto to enforce the inclusion of sender_id.
• Updated ChatService.addReaction() to accept sender_id as a mandatory 4th argument.
• Refactored BaseChatService and gateways to extract the playerId from the authenticated socket client and pass it through to the service layer.
• Updated ReactionDtoBuilder and ChatBuilderFactory with default mock IDs to satisfy TypeScript's strict requirements across all existing tests.
• Updated addReaction.test.ts to verify that sender_id is correctly persisted and returned.
• Full Pass: All 249 test suites (including global and clan chat) are passing with the new mandatory argument.

[CapoMK25]

We have to go through the transaction support PRs first since they touch the same code, and then we can move on to this.