ci : retire tout le caching (backend de cache runner injoignable, timeout 4m30)

Les logs montrent que chaque operation actions/cache attend ~4m30 avant
ETIMEDOUT sur le serveur de cache du runner Gitea (51.91.78.99:39531) :
- cache: npm de setup-node = tout le 'Setup Node 22' (271s)
- cache node_modules et cache .nuxt : timeouts additionnels
- cache Composer cote backend : meme risque

Node 22 est deja dans le tool-cache (install instantane), npm ci a froid
~30s, build ~20s : le caching n'apportait rien ici. A re-activer si le
serveur de cache du runner est repare.

config/version.yaml

@@ -1,2 +1,2 @@
 parameters:
-    app.version: '0.1.43'
+    app.version: '0.1.40'

migrations/Version20260527164000.php

@@ -1,90 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace DoctrineMigrations;
-
-use Doctrine\DBAL\Schema\Schema;
-use Doctrine\Migrations\AbstractMigration;
-
-/**
- * M0 — Catalog : creation des tables `category_type` (referentiel) et `category`.
- *
- * Le referentiel `category_type` est cree vide ; ses valeurs seront seedees
- * ulterieurement (cf. spec-back M0 § 9 HP-1).
- *
- * Index unique partiel sur (LOWER(name), category_type_id) WHERE deleted_at
- * IS NULL : permet la recreation d'une categorie apres suppression logique
- * (cf. RG-1.07). Postgres supporte nativement le `CREATE UNIQUE INDEX ... WHERE`.
- *
- * Les 4 colonnes Timestampable/Blamable (`created_at`, `updated_at`,
- * `created_by`, `updated_by`) materialisent le pattern Shared (cf. ERP-52,
- * spec-back M0 § 2.8) : NOT NULL pour les dates (remplies par le subscriber),
- * nullable + ON DELETE SET NULL pour les FK user (creation hors contexte HTTP
- * et suppression d'un user sans bloquer les categories existantes).
- *
- * Migration placee au namespace racine `DoctrineMigrations` (regle ABSOLUE
- * Starseed n°11) : avec plusieurs migrations_paths, Doctrine Migrations 3.x
- * trie par FQCN alphabetique et non par version timestamp → l'init des tables
- * d'un module doit vivre au namespace racine pour garantir l'ordre sur base
- * vide.
- */
-final class Version20260527164000 extends AbstractMigration
-{
-    public function getDescription(): string
-    {
-        return 'M0 Catalog : tables category_type et category, index unique partiel.';
-    }
-
-    public function up(Schema $schema): void
-    {
-        $this->addSql(<<<'SQL'
-            CREATE TABLE category_type (
-                id INT GENERATED BY DEFAULT AS IDENTITY NOT NULL,
-                code VARCHAR(40) NOT NULL,
-                label VARCHAR(120) NOT NULL,
-                PRIMARY KEY (id)
-            )
-            SQL);
-        $this->addSql('CREATE UNIQUE INDEX uq_category_type_code ON category_type (code)');
-
-        $this->addSql(<<<'SQL'
-            CREATE TABLE category (
-                id INT GENERATED BY DEFAULT AS IDENTITY NOT NULL,
-                name VARCHAR(120) NOT NULL,
-                category_type_id INT NOT NULL,
-                deleted_at TIMESTAMP(0) WITHOUT TIME ZONE DEFAULT NULL,
-                created_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL,
-                updated_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL,
-                created_by INT DEFAULT NULL,
-                updated_by INT DEFAULT NULL,
-                PRIMARY KEY (id),
-                CONSTRAINT fk_category_type
-                    FOREIGN KEY (category_type_id) REFERENCES category_type (id) ON DELETE RESTRICT,
-                CONSTRAINT fk_category_created_by
-                    FOREIGN KEY (created_by) REFERENCES "user" (id) ON DELETE SET NULL,
-                CONSTRAINT fk_category_updated_by
-                    FOREIGN KEY (updated_by) REFERENCES "user" (id) ON DELETE SET NULL
-            )
-            SQL);
-
-        // Unicite (name, type) case-insensitive, seulement sur les non-soft-deleted.
-        $this->addSql(<<<'SQL'
-            CREATE UNIQUE INDEX uq_category_name_type_active
-            ON category (LOWER(name), category_type_id)
-            WHERE deleted_at IS NULL
-            SQL);
-
-        $this->addSql('CREATE INDEX idx_category_deleted_at ON category (deleted_at)');
-        $this->addSql('CREATE INDEX idx_category_type_id ON category (category_type_id)');
-        $this->addSql('CREATE INDEX idx_category_created_by ON category (created_by)');
-        $this->addSql('CREATE INDEX idx_category_updated_by ON category (updated_by)');
-    }
-
-    public function down(Schema $schema): void
-    {
-        // Ordre important : `category` porte les FK vers `category_type`.
-        $this->addSql('DROP TABLE category');
-        $this->addSql('DROP TABLE category_type');
-    }
-}