feat: add groove discovery endpoint for gitbot-fleet dashboard

Serves GET /.well-known/groove on port 7500 with bot-orchestration
capability manifest. Completes the groove endpoint coverage across
all 10 hyperpolymath services.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

dashboard/src/groove.rs

@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: PMPL-1.0-or-later
+// Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
+
+//! Groove capability discovery endpoint for gitbot-fleet.
+//!
+//! Serves GET `/.well-known/groove` with a JSON capability manifest and
+//! GET `/health` so that groove-aware systems (Gossamer, PanLL, BoJ) can
+//! discover and probe the fleet dashboard automatically.
+//!
+//! The canonical ABI definition lives in `Groove.idr` (`gitbotFleetManifest`).
+
+use axum::response::Json;
+
+/// Groove capability manifest for gitbot-fleet.
+///
+/// Advertises the fleet's bot-orchestration capability in the standard Groove
+/// format.  Any groove-aware client can probe `GET /.well-known/groove` on
+/// port 7500 to discover this service.
+///
+/// ## Capabilities offered
+///
+/// - **bot-orchestration** — Fleet of 6 bots (rhodibot, echidnabot,
+///   sustainabot, glambot, seambot, finishbot) for automated repository
+///   maintenance across 500+ hyperpolymath repos.
+///
+/// ## Capabilities consumed
+///
+/// - **octad-storage** (VeriSimDB) — Persist dispatch outcomes and fleet
+///   metrics.
+/// - **static-analysis** (Hypatia / CodeQL) — Receive findings that drive
+///   bot dispatch decisions.
+pub async fn groove_manifest() -> Json<serde_json::Value> {
+    Json(serde_json::json!({
+        "groove_version": "1",
+        "service_id": "gitbot-fleet",
+        "service_version": "0.1.0",
+        "capabilities": {
+            "bot_orchestration": {
+                "type": "bot-orchestration",
+                "description": "Fleet of 6 bots (rhodibot, echidnabot, sustainabot, glambot, seambot, finishbot) for automated repository maintenance",
+                "protocol": "http",
+                "endpoint": "/api/v1/dispatch",
+                "requires_auth": false,
+                "panel_compatible": true
+            }
+        },
+        "consumes": ["octad-storage", "static-analysis"],
+        "endpoints": {
+            "api": "http://localhost:7500/api",
+            "health": "http://localhost:7500/health"
+        },
+        "health": "/health",
+        "applicability": ["individual", "team"]
+    }))
+}
+
+/// Lightweight health probe for groove discovery.
+///
+/// Returns a minimal JSON object indicating the service is alive.  This is
+/// the endpoint referenced by the `"health"` key in the groove manifest and
+/// is intentionally separate from the richer `/api/health` handler which
+/// returns full `FleetHealth` diagnostics.
+pub async fn health() -> Json<serde_json::Value> {
+    Json(serde_json::json!({
+        "service_id": "gitbot-fleet",
+        "status": "ok"
+    }))
+}