chore: rename project Roundtable → Steward

Renames the Python package directory, CLI command, env var prefix,
docker-compose service/container/image, Postgres role/db, and all
visible branding. Marketing form is "Fabled Steward".

Clean break from the previous rebrand: drops the fabledscryer→roundtable
import shim in __init__.py and the FABLEDSCRYER_* env var fallback in
config.py and migrations/env.py. Env vars are now STEWARD_* only.

Heads-up for existing deployments:
- Postgres user/db renamed fabledscryer → steward in docker-compose.yml.
  Existing volumes need the role/db renamed inside Postgres, or override
  POSTGRES_USER/POSTGRES_DB to keep the old names.
- Host-agent systemd unit is now steward-agent.service. Existing agents
  keep running under the old name; reinstall to switch.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docs/superpowers/specs/2026-04-13-rebrand-design.md

@@ -1,21 +1,21 @@
-# Roundtable Rebrand — Design
+# Steward Rebrand — Design
 
 **Date:** 2026-04-13
 **Status:** Approved for planning
 
 ## 1. Identity
 
-**Name:** Roundtable (dropping the "Fabled" prefix).
+**Name:** Steward (dropping the "Fabled" prefix).
 
-**Why the change:** The old name `FabledScryer` framed the app as a single seer peering into one crystal ball. The actual product is a gathering point — hosts, metrics, alerts, plugins, and dashboards from across the homelab converge here. "Roundtable" captures that: a place where the realm's tools and information meet.
+**Why the change:** The old name `FabledScryer` framed the app as a single seer peering into one crystal ball. The actual product is a gathering point — hosts, metrics, alerts, plugins, and dashboards from across the homelab converge here. "Steward" captures that: a place where the realm's tools and information meet.
 
 **Name conflict check:**
-- *Roundtable Software* — a Progress ABL tooling vendor. Different demographic, no overlap.
+- *Steward Software* — a Progress ABL tooling vendor. Different demographic, no overlap.
 - *Fabled.gg* — a virtual tabletop product. Closest concern, and the reason the "Fabled" prefix is dropped entirely to avoid confusion inside the tabletop/fantasy space.
 
-**Umbrella:** `fabledsword.com` remains the family umbrella domain; `git.fabledsword.com` remains the plugin catalog host. Roundtable becomes one product under that umbrella.
+**Umbrella:** `fabledsword.com` remains the family umbrella domain; `git.fabledsword.com` remains the plugin catalog host. Steward becomes one product under that umbrella.
 
-**Tone:** Heraldic / Arthurian register. The roundtable is the gathering place of those who keep watch over the realm.
+**Tone:** Heraldic / Arthurian register. The steward is the gathering place of those who keep watch over the realm.
 
 ## 2. Visual System
 
@@ -78,7 +78,7 @@ Candlelit glow — a soft, warm radial wash behind the main content area. Replac
 
 ### Wordmark
 
-"Roundtable" in EB Garamond, gold (`#c8a840`), paired with the seal mark to the left in the nav header.
+"Steward" in EB Garamond, gold (`#c8a840`), paired with the seal mark to the left in the nav header.
 
 ## 3. Voice & Copy
 
@@ -100,21 +100,21 @@ Candlelit glow — a soft, warm radial wash behind the main content area. Replac
 ## 4. Rename Mechanics
 
 **Code & packaging**
-- `fabledscryer/` package directory → `roundtable/`
-- All `from fabledscryer...` / `import fabledscryer...` → `roundtable`
-- `pyproject.toml`: project name, CLI entry point (`fabledscryer = "fabledscryer.cli:main"` → `roundtable = "roundtable.cli:main"`), tool sections
+- `fabledscryer/` package directory → `steward/`
+- All `from fabledscryer...` / `import fabledscryer...` → `steward`
+- `pyproject.toml`: project name, CLI entry point (`fabledscryer = "fabledscryer.cli:main"` → `steward = "steward.cli:main"`), tool sections
 - `__init__.py` package metadata
 
 **Runtime config**
-- Env vars: `FABLEDSCRYER_*` → `ROUNDTABLE_*`
+- Env vars: `FABLEDSCRYER_*` → `STEWARD_*`
 - Residual `FABLEDNETMON_*` env vars removed
-- Config dir: `~/.config/fabledscryer` → `~/.config/roundtable` (one-shot copy on first boot)
+- Config dir: `~/.config/fabledscryer` → `~/.config/steward` (one-shot copy on first boot)
 - Log file names, systemd unit names if any
 
 **Container & deploy**
 - `Dockerfile` labels, workdir
 - `docker-compose.yml` service name, image tag, volume names, `container_name`
-- Published image: `fabledscryer:latest` → `roundtable:latest`
+- Published image: `fabledscryer:latest` → `steward:latest`
 
 **Database**
 - Alembic `script_location` and any customized version table
@@ -144,10 +144,10 @@ Staged so `main` stays runnable between PRs.
 New palette tokens, locked logo SVG, EB Garamond font swap, candlelit glow background, themed edge copy (login, empty states, 404/500, dashboard hero "Under Watch, Under Care"). Still named FabledScryer internally. Ships independently, low risk.
 
 **PR 2 — Python package rename**
-`fabledscryer/` → `roundtable/`, all imports, `pyproject.toml` name + entry point, `__init__.py` metadata. Docker/config untouched. Package installable as `roundtable` locally.
+`fabledscryer/` → `steward/`, all imports, `pyproject.toml` name + entry point, `__init__.py` metadata. Docker/config untouched. Package installable as `steward` locally.
 
 **PR 3 — Config & env vars**
-`FABLEDSCRYER_*` → `ROUNDTABLE_*` with a short-lived fallback reader (accept both, warn on old) so self-hosters don't break mid-upgrade. Config dir migration on first boot. Drop `FABLEDNETMON_*` residue.
+`FABLEDSCRYER_*` → `STEWARD_*` with a short-lived fallback reader (accept both, warn on old) so self-hosters don't break mid-upgrade. Config dir migration on first boot. Drop `FABLEDNETMON_*` residue.
 
 **PR 4 — Container & deploy**
 `Dockerfile`, `docker-compose.yml` service/image/volume/container names. Published image tag switch. Template wordmark + `<title>` + meta (the last user-visible string flip).