Changeset 0.22.8 (#150)

server/database/migrations/015_health.sql

@@ -0,0 +1,23 @@
+-- ==========================================
+-- Chat Switchboard — 015 Tool Health
+-- ==========================================
+-- Health tracking for built-in tools (web_search, url_fetch, etc.).
+-- ==========================================
+
+CREATE TABLE IF NOT EXISTS tool_health (
+    id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tool_name       TEXT NOT NULL,
+    window_start    TIMESTAMPTZ NOT NULL,
+    request_count   INT NOT NULL DEFAULT 0,
+    error_count     INT NOT NULL DEFAULT 0,
+    total_latency_ms BIGINT NOT NULL DEFAULT 0,
+    max_latency_ms  INT NOT NULL DEFAULT 0,
+    last_error      TEXT,
+    last_error_at   TIMESTAMPTZ,
+    updated_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
+
+    UNIQUE (tool_name, window_start)
+);
+
+CREATE INDEX IF NOT EXISTS idx_tool_health_window
+    ON tool_health (tool_name, window_start DESC);