docs: roundtable rename sweep

Sweeps README, docs/, example configs, code docstrings, report and
notification subject lines, plugin catalog URL default, and stray
comments in Dockerfile/entrypoint.sh/.gitignore. Adds a legacy note
to docs/core/configuration.md explaining the FABLEDSCRYER_* fallback.
docker-compose DB credentials intentionally left as fabledscryer to
preserve the existing pgdata volume.

roundtable/core/notifications.py

@@ -33,7 +33,7 @@ async def dispatch_notifications(
 async def _send_email(cfg: dict, alert: dict) -> dict:
     try:
         msg = EmailMessage()
-        msg["Subject"] = f"[Fabled Scryer] {alert['state']} — {alert['rule_name']}"
+        msg["Subject"] = f"[Roundtable] {alert['state']} — {alert['rule_name']}"
         msg["From"] = cfg.get("username", "roundtable@localhost")
         msg["To"] = ", ".join(cfg["recipients"])
         msg.set_content(

roundtable/core/reports.py

@@ -152,7 +152,7 @@ def _render_report_text(data: dict) -> str:
     now = data["generated_at"]
     lines: list[str] = []
 
-    lines.append("Fabled Scryer — Weekly Report")
+    lines.append("Roundtable — Weekly Report")
     lines.append(f"Generated: {now.strftime('%Y-%m-%d %H:%M UTC')}")
     lines.append("")
 
@@ -204,7 +204,7 @@ def _render_report_text(data: dict) -> str:
         lines.append("")
 
     lines.append("─" * 40)
-    lines.append("Fabled Scryer — https://git.fabledsword.com/bvandeusen/FabledScryer")
+    lines.append("Roundtable — https://git.fabledsword.com/bvandeusen/Roundtable")
     return "\n".join(lines)
 
 
@@ -222,7 +222,7 @@ async def send_report(app) -> tuple[bool, str]:
 
     body = _render_report_text(data)
     date_str = data["generated_at"].strftime("%Y-%m-%d")
-    subject = f"[Fabled Scryer] Weekly Report — {date_str}"
+    subject = f"[Roundtable] Weekly Report — {date_str}"
 
     msg = EmailMessage()
     msg["Subject"] = subject

roundtable/core/settings.py

@@ -50,7 +50,7 @@ DEFAULTS: dict[str, Any] = {
     "ansible.sources": [],
     "ping.threshold.good_ms": 50,
     "ping.threshold.warn_ms": 200,
-    "plugins.index_url": "https://git.fabledsword.com/bvandeusen/FabledScryer-plugins/raw/branch/main/index.yaml",
+    "plugins.index_url": "https://git.fabledsword.com/bvandeusen/Roundtable-plugins/raw/branch/main/index.yaml",
     # OIDC single-sign-on
     "oidc.enabled": False,
     "oidc.discovery_url": "",