refactor(scripts): reorganize scripts/ into seed/ and validate/ subfolders

Move 9 init/seed scripts into scripts/seed/ and 7 validation scripts
(+ validators/ subfolder) into scripts/validate/ to reduce clutter in
the root scripts/ directory. Update all references across Makefile,
CI/CD configs, pre-commit hooks, docs (~40 files), and Python imports.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/README.md

@@ -21,19 +21,19 @@ This directory contains scripts for validating and enforcing architectural patte
 
 ```bash
 # Validate entire codebase
-python scripts/validate_architecture.py
+python scripts/validate/validate_architecture.py
 
 # Validate specific directory
-python scripts/validate_architecture.py app/api/
+python scripts/validate/validate_architecture.py app/api/
 
 # Verbose output with code context
-python scripts/validate_architecture.py --verbose
+python scripts/validate/validate_architecture.py --verbose
 
 # Show only errors (suppress warnings)
-python scripts/validate_architecture.py --errors-only
+python scripts/validate/validate_architecture.py --errors-only
 
 # Use custom config file
-python scripts/validate_architecture.py --config custom-rules.yaml
+python scripts/validate/validate_architecture.py --config custom-rules.yaml
 ```
 
 ### Exit Codes
@@ -175,7 +175,7 @@ jobs:
 
       - name: Validate Architecture
         run: |
-          python scripts/validate_architecture.py
+          python scripts/validate/validate_architecture.py
 ```
 
 ### Documentation
@@ -192,7 +192,7 @@ To add new rules:
 1. Add rule definition to `.architecture-rules.yaml`
 2. Implement validation logic in `validate_architecture.py`
 3. Add examples to `docs/architecture/architecture-patterns.md`
-4. Test with `python scripts/validate_architecture.py --verbose`
+4. Test with `python scripts/validate/validate_architecture.py --verbose`
 
 ### Troubleshooting