refactor(migration): merge per-plugin SQL into single initial migration

Each plugin now has exactly one migration file (00001_initial.sql)
containing its complete table schema and seed data, replacing the
multi-file approach with split ALTER/INSERT steps.

Changes per plugin:
- auth: w_auth_sources, w_external_accounts, w_access_tokens + login session seed
- user: w_users + system user seed (removed w_access_tokens — belongs to auth)
- admin: w_system_configs, w_templates + all 32 config seeds + 2 template seeds
  (removed w_schedules, w_task_executions — belong to driver plugins)
- upload: w_upload_stats + indexes + access_mode + backfill
- message_gateway: all w_message_*, w_push_*, w_push_channels, w_push_histories
- risk_control/logstore: w_user_access_logs (PG + ClickHouse)
- driver_asynq_cron: w_schedules + cleanup seed
- driver_asynq_worker: w_task_executions

All CREATE TABLE use IF NOT EXISTS, all INSERT use ON CONFLICT DO NOTHING.
go:embed patterns remain 'migrations/*.sql' — unchanged.

plugins/domain/message_gateway/migrations/00001_initial.sql

@@ -90,4 +90,4 @@ DROP TABLE IF EXISTS w_push_events;
 DROP TABLE IF EXISTS w_message_pairing_codes;
 DROP TABLE IF EXISTS w_message_bindings;
 DROP TABLE IF EXISTS w_message_channels;
--- +goose StatementEnd
+-- +goose StatementEnd

plugins/domain/message_gateway/migrations/00002_create_push_tables.sql

@@ -1,34 +0,0 @@
--- +goose Up
-CREATE TABLE IF NOT EXISTS w_push_events (
-    id BIGSERIAL PRIMARY KEY,
-    event_key VARCHAR(80) NOT NULL UNIQUE,
-    name VARCHAR(100) NOT NULL,
-    channels TEXT NOT NULL,
-    targets TEXT NOT NULL,
-    template TEXT NOT NULL,
-    enabled BOOLEAN NOT NULL DEFAULT FALSE,
-    created_at TIMESTAMPTZ NOT NULL,
-    updated_at TIMESTAMPTZ NOT NULL
-);
-
-CREATE INDEX IF NOT EXISTS idx_w_push_events_enabled ON w_push_events(enabled);
-
-CREATE TABLE IF NOT EXISTS w_push_histories (
-    id BIGSERIAL PRIMARY KEY,
-    event_key VARCHAR(80) NOT NULL,
-    channel VARCHAR(50) NOT NULL,
-    target VARCHAR(255) NOT NULL,
-    title VARCHAR(255) NOT NULL,
-    content TEXT NOT NULL,
-    level VARCHAR(20) NOT NULL,
-    status VARCHAR(20) NOT NULL,
-    error_msg TEXT,
-    created_at TIMESTAMPTZ NOT NULL
-);
-
-CREATE INDEX IF NOT EXISTS idx_w_push_histories_event ON w_push_histories(event_key);
-CREATE INDEX IF NOT EXISTS idx_w_push_histories_created ON w_push_histories(created_at);
-
--- +goose Down
-DROP TABLE IF EXISTS w_push_histories;
-DROP TABLE IF EXISTS w_push_events;

plugins/domain/message_gateway/migrations/00003_create_push_channels.sql

@@ -1,19 +0,0 @@
--- +goose Up
-CREATE TABLE IF NOT EXISTS w_push_channels (
-    id BIGSERIAL PRIMARY KEY,
-    name VARCHAR(80) NOT NULL UNIQUE,
-    description VARCHAR(255),
-    type VARCHAR(50) NOT NULL DEFAULT 'custom',
-    token VARCHAR(100),
-    url TEXT NOT NULL,
-    other TEXT NOT NULL,
-    enabled BOOLEAN NOT NULL DEFAULT TRUE,
-    created_at TIMESTAMPTZ NOT NULL,
-    updated_at TIMESTAMPTZ NOT NULL
-);
-
-CREATE INDEX IF NOT EXISTS idx_w_push_channels_name ON w_push_channels(name);
-CREATE INDEX IF NOT EXISTS idx_w_push_channels_enabled ON w_push_channels(enabled);
-
--- +goose Down
-DROP TABLE IF EXISTS w_push_channels;

plugins/domain/message_gateway/migrations/00004_add_push_task_type.sql

@@ -1,7 +0,0 @@
--- +goose Up
-ALTER TABLE w_push_events ADD COLUMN IF NOT EXISTS task_type VARCHAR(100) NOT NULL DEFAULT '';
-CREATE INDEX IF NOT EXISTS idx_w_push_events_task_type ON w_push_events(task_type);
-
--- +goose Down
-DROP INDEX IF EXISTS idx_w_push_events_task_type;
-ALTER TABLE w_push_events DROP COLUMN IF EXISTS task_type;

plugins/domain/message_gateway/migrations/00005_remove_push_config.sql

@@ -1,6 +0,0 @@
--- +goose Up
-DELETE FROM w_system_configs WHERE key = 'push_config';
-DELETE FROM w_push_events WHERE event_key = 'admin_login';
-DELETE FROM w_system_configs WHERE key = 'push_global_token';
-
--- +goose Down