Docs: Consolidate admin documentation and migrate reference data

- Created LOCAL_DEVELOPMENT_GUIDE.md and DEPLOYMENT_GUIDE_MANUAL.md from legacy txt files.
- Migrated country/time_zone data and requirements.txt to documentation/reference_data/.
- Removed redundant admin/documentation/ and admin/data_files/ directories.
- Enhanced app/lib_schema_v3.py to explicitly capture 'required' fields from DB 'NOT NULL' constraint.
- Added verification tests for schema logic and standalone DB connectivity.

documentation/LOCAL_DEVELOPMENT_GUIDE.md

@@ -0,0 +1,78 @@
+# Local Development Guide
+
+This guide provides instructions for setting up and running the Aether API locally for development.
+
+## 1. Prerequisites
+- Python 3.9+ (or as specified in `requirements.txt`)
+- `virtualenv` or `venv`
+
+## 2. Setup Procedure
+
+### Create and Activate Environment
+```bash
+# Go to root of application
+cd ~/path/to/directory/aether_api_fastapi/
+
+# Create new application environment
+virtualenv environment
+
+# Activate application environment
+source environment/bin/activate
+```
+
+### Install Requirements
+```bash
+# Install application requirements
+pip install -r admin/requirements.txt
+
+# Troubleshooting/Force Reinstall if needed:
+# pip install --upgrade --force-reinstall -r admin/requirements.txt
+# pip install --ignore-installed -r admin/requirements.txt
+```
+
+## 3. Running the Application
+
+### Start with Uvicorn (Reload enabled)
+```bash
+uvicorn app.main:app --host 0.0.0.0 --port 5005 --reload
+```
+
+### Accessing the API
+The application will be available at:
+- API Root: [http://localhost:5005](http://localhost:5005)
+- Swagger Docs: [http://localhost:5005/docs](http://localhost:5005/docs)
+
+## 4. Git Workflow Basics
+
+### Initialization
+```bash
+git init
+git remote add origin https://scott_idem@bitbucket.org/oneskyit/one-sky-it-api.git
+```
+
+### Basic Commands
+```bash
+# Adding and committing
+git add .
+git commit -m 'Your commit message'
+
+# Pushing to branches
+git push -u origin master
+git push -u origin development
+```
+
+### Branch Management
+```bash
+# List branches
+git branch -a
+
+# Create and switch to new branch
+git branch new-branch-name
+git switch new-branch-name
+```
+
+## 5. Deployment Basics (Manual)
+If you are cloning for the first time on a server:
+```bash
+git clone https://scott_idem@bitbucket.org/oneskyit/one-sky-it-api-fastapi.git /srv/http/destination_path
+```