Initial sql schema drafts (#49)

## Summary

Description:
Added SQL schemas to support the volunteer management system, including
tables for:

Event Log: Tracks changes to profiles, teams, and roles.
Profile: Stores volunteer details like name, email, and description.
Team: Stores team information, including name and description.
Role: Defines roles for profiles within teams, with foreign key
relationships to profile and team tables.
This setup ensures data integrity and supports tracking of
volunteer-related events.

## Tests


## Additional information

#48

Previous work: #21 

Closes: #43

src/db/drop_tables.sql

@@ -0,0 +1,5 @@
+-- Drop existing tables if they exist
+DROP TABLE IF EXISTS event_log;
+DROP TABLE IF EXISTS profile;
+DROP TABLE IF EXISTS role;
+DROP TABLE IF EXISTS team;

src/db/event_log.sql

@@ -0,0 +1,12 @@
+-- Event Log Schema
+CREATE TABLE IF NOT EXISTS event_log (
+    id TEXT PRIMARY KEY NOT NULL UNIQUE COLLATE BINARY,               -- UUID stored as TEXT
+    schemaVersion INTEGER NOT NULL,
+    subject TEXT NOT NULL UNIQUE COLLATE BINARY,             -- UUID stored as TEXT (could be user or entity performing the action)
+    subjectSource TEXT NOT NULL DEFAULT 'profile' CHECK("subjectSource" IN ('profile', 'team', 'role', 'special'))
+    verb TEXT NOT NULL,                -- Action (e.g., 'join', 'leave', 'assigned to')
+    object TEXT NOT NULL UNIQUE COLLATE BINARY,              -- UUID stored as TEXT (the affected entity, e.g., profile, team)
+    objectSource TEXT NOT NULL DEFAULT 'special' CHECK("objectSource" IN ('profile', 'team', 'role', 'special'))
+    happenedAt TEXT NOT NULL,          -- The time the event occurred
+    insertedAt TEXT NOT NULL,          -- When the event log was inserted
+);

src/db/profile.sql

@@ -0,0 +1,11 @@
+-- Volunteer Profile Schema
+CREATE TABLE IF NOT EXISTS profile (
+    id TEXT PRIMARY KEY NOT NULL UNIQUE COLLATE BINARY,               -- UUID stored as TEXT
+    email TEXT NOT NULL UNIQUE,
+    schemaVersion INTEGER NOT NULL,
+    name TEXT NOT NULL,
+    description TEXT,
+    happenedAt TEXT NOT NULL,
+    insertedAt TEXT NOT NULL,
+    links TEXT                                                          -- Store markup for social links
+);

src/db/role.sql

@@ -0,0 +1,13 @@
+-- Role Schema
+CREATE TABLE IF NOT EXISTS role (
+    id TEXT PRIMARY KEY NOT NULL UNIQUE COLLATE BINARY,               -- UUID stored as TEXT
+    schemaVersion INTEGER NOT NULL,
+    role TEXT NOT NULL,
+    description TEXT,
+    teamId TEXT NOT NULL UNIQUE COLLATE BINARY,              -- UUID stored as TEXT
+    profileId TEXT NOT NULL UNIQUE COLLATE BINARY,           -- UUID stored as TEXT
+    happenedAt TEXT NOT NULL,
+    insertedAt TEXT NOT NULL,
+    FOREIGN KEY (teamId) REFERENCES team(id),
+    FOREIGN KEY (profileId) REFERENCES profile(id)
+);

src/db/team.sql

@@ -0,0 +1,9 @@
+-- Team Schema
+CREATE TABLE IF NOT EXISTS team (
+    id TEXT PRIMARY KEY NOT NULL UNIQUE COLLATE BINARY,               -- UUID stored as TEXT
+    schemaVersion INTEGER NOT NULL,
+    name TEXT NOT NULL,
+    description TEXT,
+    happenedAt TEXT NOT NULL,
+    insertedAt TEXT NOT NULL
+);