refactor(channelserver): split repo_guild.go into domain-focused files

The 1004-line monolith covered 11 game subsystems across 62 methods.
Split into 7 files by domain (RP, posts, alliances, adventures, hunts,
cooking) while keeping core CRUD/membership/scouts in the original.
Same package, receiver, and interface — no behavior changes.

server/channelserver/repo_guild_alliance.go

@@ -0,0 +1,115 @@
+package channelserver
+
+import (
+	"fmt"
+
+	"github.com/jmoiron/sqlx"
+)
+
+const allianceInfoSelectSQL = `
+SELECT
+ga.id,
+ga.name,
+created_at,
+parent_id,
+CASE
+	WHEN sub1_id IS NULL THEN 0
+	ELSE sub1_id
+END,
+CASE
+	WHEN sub2_id IS NULL THEN 0
+	ELSE sub2_id
+END
+FROM guild_alliances ga
+`
+
+// GetAllianceByID loads alliance data including parent and sub guilds.
+func (r *GuildRepository) GetAllianceByID(allianceID uint32) (*GuildAlliance, error) {
+	rows, err := r.db.Queryx(fmt.Sprintf(`%s WHERE ga.id = $1`, allianceInfoSelectSQL), allianceID)
+	if err != nil {
+		return nil, err
+	}
+	defer func() { _ = rows.Close() }()
+	if !rows.Next() {
+		return nil, nil
+	}
+	return r.scanAllianceWithGuilds(rows)
+}
+
+// ListAlliances returns all alliances with their guild data populated.
+func (r *GuildRepository) ListAlliances() ([]*GuildAlliance, error) {
+	rows, err := r.db.Queryx(allianceInfoSelectSQL)
+	if err != nil {
+		return nil, err
+	}
+	defer func() { _ = rows.Close() }()
+	var alliances []*GuildAlliance
+	for rows.Next() {
+		alliance, err := r.scanAllianceWithGuilds(rows)
+		if err != nil {
+			continue
+		}
+		alliances = append(alliances, alliance)
+	}
+	return alliances, nil
+}
+
+// CreateAlliance creates a new guild alliance with the given parent guild.
+func (r *GuildRepository) CreateAlliance(name string, parentGuildID uint32) error {
+	_, err := r.db.Exec("INSERT INTO guild_alliances (name, parent_id) VALUES ($1, $2)", name, parentGuildID)
+	return err
+}
+
+// DeleteAlliance removes an alliance by ID.
+func (r *GuildRepository) DeleteAlliance(allianceID uint32) error {
+	_, err := r.db.Exec("DELETE FROM guild_alliances WHERE id=$1", allianceID)
+	return err
+}
+
+// RemoveGuildFromAlliance removes a guild from its alliance, shifting sub2 into sub1's slot if needed.
+func (r *GuildRepository) RemoveGuildFromAlliance(allianceID, guildID, subGuild1ID, subGuild2ID uint32) error {
+	if guildID == subGuild1ID && subGuild2ID > 0 {
+		_, err := r.db.Exec(`UPDATE guild_alliances SET sub1_id = sub2_id, sub2_id = NULL WHERE id = $1`, allianceID)
+		return err
+	} else if guildID == subGuild1ID {
+		_, err := r.db.Exec(`UPDATE guild_alliances SET sub1_id = NULL WHERE id = $1`, allianceID)
+		return err
+	}
+	_, err := r.db.Exec(`UPDATE guild_alliances SET sub2_id = NULL WHERE id = $1`, allianceID)
+	return err
+}
+
+// scanAllianceWithGuilds scans an alliance row and populates its guild data.
+func (r *GuildRepository) scanAllianceWithGuilds(rows *sqlx.Rows) (*GuildAlliance, error) {
+	alliance := &GuildAlliance{}
+	if err := rows.StructScan(alliance); err != nil {
+		return nil, err
+	}
+
+	parentGuild, err := r.GetByID(alliance.ParentGuildID)
+	if err != nil {
+		return nil, err
+	}
+	alliance.ParentGuild = *parentGuild
+	alliance.TotalMembers += parentGuild.MemberCount
+
+	if alliance.SubGuild1ID > 0 {
+		subGuild1, err := r.GetByID(alliance.SubGuild1ID)
+		if err != nil {
+			return nil, err
+		}
+		alliance.SubGuild1 = *subGuild1
+		alliance.TotalMembers += subGuild1.MemberCount
+	}
+
+	if alliance.SubGuild2ID > 0 {
+		subGuild2, err := r.GetByID(alliance.SubGuild2ID)
+		if err != nil {
+			return nil, err
+		}
+		alliance.SubGuild2 = *subGuild2
+		alliance.TotalMembers += subGuild2.MemberCount
+	}
+
+	return alliance, nil
+}