fix: use Confluence v2 API for page creation (v1 returns 410 Gone)

Switch from /wiki/rest/api/content to /wiki/api/v2/pages.
V2 requires space ID instead of key, so resolve via /api/v2/spaces first.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bot.py

@@ -651,18 +651,31 @@ class AtlassianClient:
         if not cloud_id:
             return "Error: Could not determine Atlassian Cloud instance."
         try:
+            headers = {"Authorization": f"Bearer {token}"}
+            async with httpx.AsyncClient(timeout=15.0) as client:
+                # Resolve space key to space ID (v2 API requires ID)
+                space_resp = await client.get(
+                    f"https://api.atlassian.com/ex/confluence/{cloud_id}/wiki/api/v2/spaces",
+                    params={"keys": space_key},
+                    headers=headers,
+                )
+                space_resp.raise_for_status()
+                spaces = space_resp.json().get("results", [])
+                if not spaces:
+                    return f"Space '{space_key}' not found."
+                space_id = spaces[0]["id"]
+
                 paragraphs = [p.strip() for p in content.split("\n") if p.strip()]
                 body_html = "".join(f"<p>{p}</p>" for p in paragraphs) if paragraphs else f"<p>{content}</p>"
-            async with httpx.AsyncClient(timeout=15.0) as client:
                 resp = await client.post(
-                    f"https://api.atlassian.com/ex/confluence/{cloud_id}/wiki/rest/api/content",
+                    f"https://api.atlassian.com/ex/confluence/{cloud_id}/wiki/api/v2/pages",
                     json={
-                        "type": "page",
+                        "spaceId": space_id,
+                        "status": "current",
                         "title": title,
-                        "space": {"key": space_key},
-                        "body": {"storage": {"value": body_html, "representation": "storage"}},
+                        "body": {"representation": "storage", "value": body_html},
                     },
-                    headers={"Authorization": f"Bearer {token}"},
+                    headers=headers,
                 )
                 resp.raise_for_status()
                 data = resp.json()