feat(alerting): V12 flyway migration for alerting tables

cameleer-server-app/src/main/resources/db/migration/V12__alerting_tables.sql

@@ -0,0 +1,110 @@
+-- V12 — Alerting tables
+-- Enums (outbound_method_enum / outbound_auth_kind_enum / trust_mode_enum already exist from V11)
+CREATE TYPE severity_enum            AS ENUM ('CRITICAL','WARNING','INFO');
+CREATE TYPE condition_kind_enum      AS ENUM ('ROUTE_METRIC','EXCHANGE_MATCH','AGENT_STATE','DEPLOYMENT_STATE','LOG_PATTERN','JVM_METRIC');
+CREATE TYPE alert_state_enum         AS ENUM ('PENDING','FIRING','ACKNOWLEDGED','RESOLVED');
+CREATE TYPE target_kind_enum         AS ENUM ('USER','GROUP','ROLE');
+CREATE TYPE notification_status_enum AS ENUM ('PENDING','DELIVERED','FAILED');
+
+CREATE TABLE alert_rules (
+  id                          uuid PRIMARY KEY,
+  environment_id              uuid NOT NULL REFERENCES environments(id) ON DELETE CASCADE,
+  name                        varchar(200) NOT NULL,
+  description                 text,
+  severity                    severity_enum NOT NULL,
+  enabled                     boolean NOT NULL DEFAULT true,
+  condition_kind              condition_kind_enum NOT NULL,
+  condition                   jsonb NOT NULL,
+  evaluation_interval_seconds int NOT NULL DEFAULT 60 CHECK (evaluation_interval_seconds >= 5),
+  for_duration_seconds        int NOT NULL DEFAULT 0 CHECK (for_duration_seconds >= 0),
+  re_notify_minutes           int NOT NULL DEFAULT 60 CHECK (re_notify_minutes >= 0),
+  notification_title_tmpl     text NOT NULL,
+  notification_message_tmpl   text NOT NULL,
+  webhooks                    jsonb NOT NULL DEFAULT '[]',
+  next_evaluation_at          timestamptz NOT NULL DEFAULT now(),
+  claimed_by                  varchar(64),
+  claimed_until               timestamptz,
+  eval_state                  jsonb NOT NULL DEFAULT '{}',
+  created_at                  timestamptz NOT NULL DEFAULT now(),
+  created_by                  text NOT NULL REFERENCES users(user_id),
+  updated_at                  timestamptz NOT NULL DEFAULT now(),
+  updated_by                  text NOT NULL REFERENCES users(user_id)
+);
+CREATE INDEX alert_rules_env_idx       ON alert_rules (environment_id);
+CREATE INDEX alert_rules_claim_due_idx ON alert_rules (next_evaluation_at) WHERE enabled = true;
+
+CREATE TABLE alert_rule_targets (
+  id          uuid PRIMARY KEY,
+  rule_id     uuid NOT NULL REFERENCES alert_rules(id) ON DELETE CASCADE,
+  target_kind target_kind_enum NOT NULL,
+  target_id   varchar(128) NOT NULL,
+  UNIQUE (rule_id, target_kind, target_id)
+);
+CREATE INDEX alert_rule_targets_lookup_idx ON alert_rule_targets (target_kind, target_id);
+
+CREATE TABLE alert_instances (
+  id                  uuid PRIMARY KEY,
+  rule_id             uuid REFERENCES alert_rules(id) ON DELETE SET NULL,
+  rule_snapshot       jsonb NOT NULL,
+  environment_id      uuid NOT NULL REFERENCES environments(id) ON DELETE CASCADE,
+  state               alert_state_enum NOT NULL,
+  severity            severity_enum NOT NULL,
+  fired_at            timestamptz NOT NULL,
+  acked_at            timestamptz,
+  acked_by            text REFERENCES users(user_id),
+  resolved_at         timestamptz,
+  last_notified_at    timestamptz,
+  silenced            boolean NOT NULL DEFAULT false,
+  current_value       numeric,
+  threshold           numeric,
+  context             jsonb NOT NULL,
+  title               text NOT NULL,
+  message             text NOT NULL,
+  target_user_ids     text[] NOT NULL DEFAULT '{}',
+  target_group_ids    uuid[] NOT NULL DEFAULT '{}',
+  target_role_names   text[] NOT NULL DEFAULT '{}'
+);
+CREATE INDEX alert_instances_inbox_idx     ON alert_instances (environment_id, state, fired_at DESC);
+CREATE INDEX alert_instances_open_rule_idx ON alert_instances (rule_id, state) WHERE rule_id IS NOT NULL;
+CREATE INDEX alert_instances_resolved_idx  ON alert_instances (resolved_at) WHERE state = 'RESOLVED';
+CREATE INDEX alert_instances_target_u_idx  ON alert_instances USING GIN (target_user_ids);
+CREATE INDEX alert_instances_target_g_idx  ON alert_instances USING GIN (target_group_ids);
+CREATE INDEX alert_instances_target_r_idx  ON alert_instances USING GIN (target_role_names);
+
+CREATE TABLE alert_silences (
+  id             uuid PRIMARY KEY,
+  environment_id uuid NOT NULL REFERENCES environments(id) ON DELETE CASCADE,
+  matcher        jsonb NOT NULL,
+  reason         text,
+  starts_at      timestamptz NOT NULL,
+  ends_at        timestamptz NOT NULL CHECK (ends_at > starts_at),
+  created_by     text NOT NULL REFERENCES users(user_id),
+  created_at     timestamptz NOT NULL DEFAULT now()
+);
+CREATE INDEX alert_silences_active_idx ON alert_silences (environment_id, ends_at);
+
+CREATE TABLE alert_notifications (
+  id                     uuid PRIMARY KEY,
+  alert_instance_id      uuid NOT NULL REFERENCES alert_instances(id) ON DELETE CASCADE,
+  webhook_id             uuid,
+  outbound_connection_id uuid REFERENCES outbound_connections(id) ON DELETE SET NULL,
+  status                 notification_status_enum NOT NULL DEFAULT 'PENDING',
+  attempts               int NOT NULL DEFAULT 0,
+  next_attempt_at        timestamptz NOT NULL DEFAULT now(),
+  claimed_by             varchar(64),
+  claimed_until          timestamptz,
+  last_response_status   int,
+  last_response_snippet  text,
+  payload                jsonb NOT NULL,
+  delivered_at           timestamptz,
+  created_at             timestamptz NOT NULL DEFAULT now()
+);
+CREATE INDEX alert_notifications_pending_idx  ON alert_notifications (next_attempt_at) WHERE status = 'PENDING';
+CREATE INDEX alert_notifications_instance_idx ON alert_notifications (alert_instance_id);
+
+CREATE TABLE alert_reads (
+  user_id           text NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
+  alert_instance_id uuid NOT NULL REFERENCES alert_instances(id) ON DELETE CASCADE,
+  read_at           timestamptz NOT NULL DEFAULT now(),
+  PRIMARY KEY (user_id, alert_instance_id)
+);