docs(07-01): complete config structure and schemas plan summary

.planning/phases/07-config-consolidation/07-01-SUMMARY.md

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+---
+phase: 07-config-consolidation
+plan: 01
+subsystem: configuration
+tags: [yaml, config, secrets, documentation]
+dependency_graph:
+  requires: [PHASE-6-STABILITY]
+  provides: [PHASE-7-CONFIG-STRUCT, PHASE-7-YAML-FORMAT]
+  affects: [backend, frontend, deployment]
+tech_stack:
+  added: [PyYAML]
+  patterns: [domain-driven-yaml, environment-overrides]
+key_files:
+  created:
+    - config/backend.yaml.example
+    - config/frontend.yaml.example
+    - config/network.yaml.example
+    - config/docker.yaml.example
+    - config/secrets.yaml.example
+    - config/backend.yaml
+    - config/frontend.yaml
+    - config/network.yaml
+    - config/docker.yaml
+    - config/README.md
+  modified:
+    - .gitignore
+decisions:
+  - D-01: Centralize configuration into config/ folder
+  - D-02: Use domain-specific YAML files (backend, frontend, network, docker)
+  - D-03: Separate secrets into git-ignored secrets.yaml and tracked examples
+  - D-08: Use .gitignore to protect actual values while tracking schemas
+metrics:
+  duration: 15m
+  completed_date: "2024-04-23"
+---
+
+# Phase 07 Plan 01: Config Folder Structure and YAML Schemas Summary
+
+## Substantive One-liner
+Established a structured configuration framework with 10 YAML files (5 schemas, 4 actual configs, 1 secrets template) and comprehensive documentation in `config/`.
+
+## Progress Summary
+All tasks in the plan were completed successfully. The project now has a dedicated `config/` directory with domain-specific YAML files for backend, frontend, network, and docker orchestration. Each configuration file has a corresponding `.example` file that defines its schema and is tracked by Git, while actual values are protected via `.gitignore`. A 155-line `README.md` provides complete documentation for the new system.
+
+### Key Achievements
+- **Config Folder Structure:** Created `config/` in project root, housing all configuration assets.
+- **YAML Schemas:** Created 5 `.yaml.example` files (backend, frontend, network, docker, secrets) with comprehensive comments documenting every variable, its default, and its environment override.
+- **Data Migration:** Migrated existing values from `inventory.env` into 4 actual YAML files (`backend.yaml`, `frontend.yaml`, `network.yaml`, `docker.yaml`) for immediate developer use.
+- **Git Protection:** Updated `.gitignore` with strict rules to ignore actual YAML files while ensuring schemas remain tracked.
+- **Documentation:** Created a massive 150+ line `README.md` in the `config/` folder, covering setup, load order, security practices, and troubleshooting.
+
+## Deviations from Plan
+None - plan executed exactly as written.
+
+## Known Stubs
+None. All files are complete and use valid YAML syntax.
+
+## Threat Flags
+None. All security-relevant practices (ignoring secrets, protecting actual values) were implemented.
+
+## Self-Check: PASSED
+- [x] `config/` folder exists
+- [x] 10 files in `config/` (5 examples, 4 actuals, 1 README)
+- [x] All YAML files parseable
+- [x] .gitignore rules verified
+- [x] `inventory.env` preserved for backward compatibility
+- [x] Commits made for each task (Note: Task 2 commit only includes `.gitignore` as the actual YAML files are correctly ignored)