refactor: update environment configuration, enhance installation script, and add migration scripts for database setup

docs/database/0008-project-progress-and-quota.md

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+# 0008 - Project Progress And Quota
+
+SQL file: `supabase/migrations/0008_add_project_progress_and_quota.sql`
+
+## Purpose
+
+Adds project progress mode and revision quota support.
+
+## What It Changes
+
+The `projects` table receives:
+
+- `progress_type`
+- `revision_quota`
+
+## What It Creates
+
+- `update_project_progress_on_task_change()`
+- `trigger_update_project_progress`
+- `update_project_progress_on_type_change()`
+- `trigger_update_project_progress_type`
+
+## Notes
+
+Automatic progress mode calculates progress from tasks with status `done`.
+
+## Execution
+
+Run after `0007_add_client_portal_tables.sql`.