fork: route Gitea skills through owner/repo canonical-key path

deriveCanonicalSkillKey only emitted the owner/repo-based key for
github and skills_sh sources, so Gitea skills fell through to the
generic company/{companyId}/{slug} branch. Add gitea to the
sourceType / sourceKind clause so a Gitea skill at
git.example.com/owner/repo gets key owner/repo/{slug}, matching the
GitHub format. Existing imports keep their old keys until re-imported.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

server/src/services/company-skills.ts

@@ -398,7 +398,16 @@ function deriveCanonicalSkillKey(
 
   const owner = normalizeSkillSlug(asString(metadata?.owner));
   const repo = normalizeSkillSlug(asString(metadata?.repo));
-  if ((input.sourceType === "github" || input.sourceType === "skills_sh" || sourceKind === "github" || sourceKind === "skills_sh") && owner && repo) {
+  if (
+    (input.sourceType === "github"
+      || input.sourceType === "skills_sh"
+      || input.sourceType === "gitea"
+      || sourceKind === "github"
+      || sourceKind === "skills_sh"
+      || sourceKind === "gitea")
+    && owner
+    && repo
+  ) {
     return `${owner}/${repo}/${slug}`;
   }