db-migrations: Add initial migration schema

Backend/database/migrations/final_sql_schema.sql

@@ -0,0 +1,115 @@
+-- WARNING: This schema is for context only and is not meant to be run.
+-- Table order and constraints may not be valid for execution.
+
+CREATE TABLE public.classifications (
+  id uuid NOT NULL,
+  issue_id uuid NOT NULL UNIQUE,
+  primary_category character varying,
+  primary_confidence double precision NOT NULL,
+  detections_json text,
+  inference_time_ms double precision NOT NULL,
+  model_version character varying NOT NULL,
+  created_at timestamp without time zone NOT NULL,
+  CONSTRAINT classifications_pkey PRIMARY KEY (id),
+  CONSTRAINT classifications_issue_id_fkey FOREIGN KEY (issue_id) REFERENCES public.issues(id)
+);
+CREATE TABLE public.departments (
+  id uuid NOT NULL,
+  name character varying NOT NULL UNIQUE,
+  code character varying NOT NULL UNIQUE,
+  description text,
+  categories text,
+  default_sla_hours integer NOT NULL,
+  escalation_email character varying,
+  is_active boolean NOT NULL,
+  created_at timestamp without time zone NOT NULL,
+  updated_at timestamp without time zone NOT NULL,
+  CONSTRAINT departments_pkey PRIMARY KEY (id)
+);
+CREATE TABLE public.escalations (
+  id uuid NOT NULL,
+  issue_id uuid NOT NULL,
+  from_level integer NOT NULL,
+  to_level integer NOT NULL,
+  reason text NOT NULL,
+  escalated_by character varying NOT NULL,
+  notified_emails text,
+  created_at timestamp without time zone NOT NULL,
+  CONSTRAINT escalations_pkey PRIMARY KEY (id),
+  CONSTRAINT escalations_issue_id_fkey FOREIGN KEY (issue_id) REFERENCES public.issues(id)
+);
+CREATE TABLE public.issue_events (
+  id uuid NOT NULL,
+  issue_id uuid NOT NULL,
+  event_type character varying NOT NULL,
+  agent_name character varying,
+  event_data text,
+  created_at timestamp without time zone NOT NULL,
+  CONSTRAINT issue_events_pkey PRIMARY KEY (id),
+  CONSTRAINT issue_events_issue_id_fkey FOREIGN KEY (issue_id) REFERENCES public.issues(id)
+);
+CREATE TABLE public.issue_images (
+  id uuid NOT NULL,
+  issue_id uuid NOT NULL,
+  file_path character varying NOT NULL,
+  annotated_path character varying,
+  original_filename character varying,
+  created_at timestamp without time zone NOT NULL,
+  CONSTRAINT issue_images_pkey PRIMARY KEY (id),
+  CONSTRAINT issue_images_issue_id_fkey FOREIGN KEY (issue_id) REFERENCES public.issues(id)
+);
+CREATE TABLE public.issues (
+  id uuid NOT NULL,
+  description text,
+  latitude double precision NOT NULL,
+  longitude double precision NOT NULL,
+  accuracy_meters double precision,
+  state character varying NOT NULL,
+  priority integer,
+  priority_reason text,
+  validation_source character varying,
+  validation_reason text,
+  is_duplicate boolean NOT NULL,
+  parent_issue_id uuid,
+  geo_cluster_id character varying,
+  platform character varying NOT NULL,
+  device_model character varying,
+  department_id uuid,
+  assigned_member_id uuid,
+  city character varying,
+  locality character varying,
+  full_address text,
+  sla_deadline timestamp without time zone,
+  sla_hours integer,
+  escalation_level integer NOT NULL,
+  escalated_at timestamp without time zone,
+  resolved_at timestamp without time zone,
+  resolution_notes text,
+  created_at timestamp without time zone NOT NULL,
+  updated_at timestamp without time zone NOT NULL,
+  user_id character varying,
+  proof_image_path character varying,
+  completed_at timestamp without time zone,
+  CONSTRAINT issues_pkey PRIMARY KEY (id),
+  CONSTRAINT issues_parent_issue_id_fkey FOREIGN KEY (parent_issue_id) REFERENCES public.issues(id),
+  CONSTRAINT issues_department_id_fkey FOREIGN KEY (department_id) REFERENCES public.departments(id),
+  CONSTRAINT issues_assigned_member_id_fkey FOREIGN KEY (assigned_member_id) REFERENCES public.members(id)
+);
+CREATE TABLE public.members (
+  id uuid NOT NULL,
+  department_id uuid,
+  name character varying NOT NULL,
+  email character varying NOT NULL UNIQUE,
+  phone character varying,
+  role character varying NOT NULL,
+  city character varying,
+  locality character varying,
+  is_active boolean NOT NULL,
+  current_workload integer NOT NULL,
+  max_workload integer NOT NULL,
+  created_at timestamp without time zone NOT NULL,
+  updated_at timestamp without time zone NOT NULL,
+  password_hash character varying,
+  CONSTRAINT members_pkey PRIMARY KEY (id),
+  CONSTRAINT members_department_id_fkey FOREIGN KEY (department_id) REFERENCES public.departments(id)
+);