chore(07): remove deprecated bash scripts and legacy env files

.planning/phases/07-config-consolidation/07-04-SUMMARY.md

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+# Phase 7 Wave 3 Summary: Docker Integration & Documentation (07-04)
+
+**Completed:** 2026-04-23
+**Status:** [COMPLETED]
+**Commits:** 9f267a53, 5b3a23f9, 6b7becfe, 0c6f571a, 22343941, 01e30ba7
+
+---
+
+## Accomplishments
+
+1. **docker-compose.yml Updated (D-07)**
+   - Removed `inventory.env` `env_file` references
+   - Added `./config:/app/config:ro` volume mounts for `backend`, `frontend`, and `proxy`
+   - Documented environment variable override behavior in comments
+
+2. **Dockerfile and entrypoint.sh Updated**
+   - Backend `Dockerfile` and `entrypoint.sh` refactored to use the new `/app/config/` paths
+   - Implemented config validation check during container startup
+
+3. **.gitignore Rules Finalized (D-08)**
+   - Marked `inventory.env` as deprecated
+   - Confirmed rules to ignore actual configurations while tracking `.example` schema files
+
+4. **Comprehensive Documentation (D-08)**
+   - **DEPLOYMENT.md:** Completely rewritten to reflect the new YAML configuration system and Python-based tooling
+   - **README.md:** Updated Quick Start and onboarding with the new configuration steps
+   - Cross-referenced all documents for consistent developer experience
+
+---
+
+## Technical Details
+
+- **Single Source of Truth:** `config/` folder is now established as the central point for all configuration.
+- **Security:** `secrets.yaml` is strictly ignored by git, and the Docker volume is mounted as read-only.
+- **Deprecation:** All references to `inventory.env` in the deployment infrastructure have been removed.
+
+---
+
+## Verification
+
+- [x] `docker compose config` passes with valid YAML syntax
+- [x] `.gitignore` rules correctly protect sensitive configuration files
+- [x] `DEPLOYMENT.md` and `README.md` provide clear, updated instructions
+- [x] All deployment paths integrated with the new YAML structure