chore: add missing migrations and routes

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

infra/migrations/0050_add_users.sql

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+CREATE TABLE users (
+    id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    username   TEXT NOT NULL UNIQUE,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Les tokens read ont un user_id obligatoire, les tokens admin NULL
+ALTER TABLE api_tokens ADD COLUMN user_id UUID REFERENCES users(id) ON DELETE CASCADE;
+
+-- Rendre book_reading_progress par user
+ALTER TABLE book_reading_progress DROP CONSTRAINT book_reading_progress_pkey;
+ALTER TABLE book_reading_progress ADD COLUMN user_id UUID REFERENCES users(id) ON DELETE CASCADE;
+
+-- Créer un user par défaut si des données existantes doivent être migrées
+INSERT INTO users (id, username)
+    SELECT '00000000-0000-0000-0000-000000000001', 'default'
+    WHERE EXISTS (
+        SELECT 1 FROM book_reading_progress WHERE user_id IS NULL
+        UNION ALL
+        SELECT 1 FROM api_tokens WHERE scope = 'read' AND user_id IS NULL
+    );
+
+-- Rattacher les anciennes progressions de lecture au user default
+UPDATE book_reading_progress
+    SET user_id = '00000000-0000-0000-0000-000000000001'
+    WHERE user_id IS NULL;
+
+-- Rattacher les anciens tokens read au user default
+UPDATE api_tokens
+    SET user_id = '00000000-0000-0000-0000-000000000001'
+    WHERE scope = 'read' AND user_id IS NULL;
+
+ALTER TABLE book_reading_progress ALTER COLUMN user_id SET NOT NULL;
+ALTER TABLE book_reading_progress ADD PRIMARY KEY (book_id, user_id);
+DROP INDEX IF EXISTS idx_book_reading_progress_status;
+CREATE INDEX idx_book_reading_progress_status ON book_reading_progress(status, user_id);

infra/migrations/0052_add_anilist_integration.sql

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+-- Add AniList sync support
+ALTER TABLE libraries ADD COLUMN anilist_enabled BOOLEAN NOT NULL DEFAULT FALSE;
+
+CREATE TABLE anilist_series_links (
+    library_id    UUID    NOT NULL REFERENCES libraries(id) ON DELETE CASCADE,
+    series_name   TEXT    NOT NULL,
+    anilist_id    INTEGER NOT NULL,
+    anilist_title TEXT,
+    anilist_url   TEXT,
+    status        TEXT    NOT NULL DEFAULT 'linked', -- 'linked' | 'synced' | 'error'
+    linked_at     TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    synced_at     TIMESTAMPTZ,
+    PRIMARY KEY (library_id, series_name)
+);
+
+CREATE INDEX idx_anilist_series_links_library ON anilist_series_links(library_id);

infra/migrations/0053_add_reading_status_provider.sql

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+-- Replace anilist_enabled boolean with generic reading_status_provider
+ALTER TABLE libraries ADD COLUMN reading_status_provider TEXT;
+UPDATE libraries SET reading_status_provider = 'anilist' WHERE anilist_enabled = TRUE;
+ALTER TABLE libraries DROP COLUMN anilist_enabled;
+
+-- Add provider column to anilist_series_links for future multi-provider support
+ALTER TABLE anilist_series_links ADD COLUMN provider TEXT NOT NULL DEFAULT 'anilist';
+-- Update the primary key to include provider
+ALTER TABLE anilist_series_links DROP CONSTRAINT anilist_series_links_pkey;
+ALTER TABLE anilist_series_links ADD PRIMARY KEY (library_id, series_name, provider);