feat: add diesel setup to project

migrations/2025-01-13-114912_create_plants/down.sql

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+drop table plants;

migrations/2025-01-13-114912_create_plants/up.sql

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+create table plants (
+    id integer primary key not null,
+    name text not null,
+    species text not null,
+    description text not null
+);

migrations/2025-01-13-115415_create_comments/down.sql

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+drop table comments;

migrations/2025-01-13-115415_create_comments/up.sql

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+create table comments (
+    id integer primary key not null,
+    plant_id integer references plants (id),
+    comment text not null
+);

migrations/2025-01-13-115505_create_events/down.sql

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+drop table events;

migrations/2025-01-13-115505_create_events/up.sql

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+create table events (
+    id integer primary key not null,
+    plant_id integer not null
+        references plants (id)
+        on delete cascade,
+    event_type text not null,
+    date text not null,
+    description text not null
+);

migrations/2025-01-13-115534_add_auth/down.sql

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+drop table sessions;
+drop table users;

migrations/2025-01-13-115534_add_auth/up.sql

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+create table users (
+    id integer primary key not null,
+    username text unique not null,
+    password_hash text not null,
+    admin boolean not null
+);
+
+create table sessions (
+    id integer primary key not null,
+    user_id integer not null
+        references users (id)
+        on delete cascade,
+    unique (id, user_id)
+);