fix: resolve 500 on /api/persons, session recursion and image OOM

[LukaMrt]

Summary

• 500 sur /api/persons : l'endpoint chargeait toute la table avec N+1 lazy loading. Remplacé par un endpoint de recherche ?q=&limit=20 ; retourne [] si q absent — impossible d'OOM le worker
• Récursion infinie PersistentCollection : User sérialisé en session descendait dans le graphe Person → Sponsor → Person. Ajout de __serialize/__unserialize sur User pour ne stocker que les scalaires en session
• OOM Imagick/GD : switch du driver Liip Imagine de gd vers imagick, output WebP, maxWidth/maxHeight réduit de 4096 à 2000, bust du cache avant upload et warm-up après
• Autocomplete parrain/fillot : PersonAutocomplete (synchrone, précharge toute la liste) remplacé par SuggestInput<Person> asynchrone avec debounce 200ms
• DeployResetCommand (app:deploy-reset) : invalide les sessions existantes + régénère tous les caches avatars en WebP — à lancer au déploiement
• MigratePicturesCommand supprimée (migration déjà effectuée en prod)

Test plan

• php bin/console app:deploy-reset s'exécute sans erreur
• Upload d'avatar : bust de l'ancien cache + warm-up du nouveau en WebP
• Sélecteur parrain/fillot : pas de dropdown sous 2 chars, état "Recherche…" visible, résultats après debounce
• GET /api/persons sans ?q= retourne [] (plus de 500)
• Sessions invalidées → utilisateurs déconnectés proprement au redéploiement
• Tests e2e sponsor-add.spec.ts passent

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR addresses multiple production-impacting issues around person listing/search, session serialization recursion, and avatar image processing/caching, while updating the sponsor “autocomplete” UX to use an async server-backed suggest input.

Changes:

• Replace “list all persons” behavior with a bounded search endpoint (/api/persons?q=&limit=) and update the sponsor picker to use async suggestions.
• Prevent session serialization recursion by custom-scalar serializing User; add a deploy-time reset command to clear sessions and regenerate avatar caches.
• Switch LiipImagine to Imagick + WebP output and reduce accepted avatar dimensions; add cache bust/warm-up on avatar upload.

Reviewed changes

Copilot reviewed 16 out of 20 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
frontend/src/pages/person/EditPersonPage.tsx	Replaces in-memory person autocomplete with async SuggestInput + server search; removes full-table prefetch.
frontend/src/lib/queries.ts	Adds personQueries.search(q, limit) query config for the new search endpoint.
frontend/src/lib/api/persons.ts	Replaces getPersons with searchPersons({ q, limit, orderBy }).
frontend/src/components/ui/SuggestInput.tsx	Introduces async mode with debounce/loading/empty states while keeping sync mode for existing uses.
e2e/tests/profile/sponsor-add.spec.ts	Adds e2e coverage for async autocomplete behavior and updates sponsor-add flow.
docker/Dockerfile	Installs Imagick extension and runtime packages for LiipImagine driver switch.
backend/src/Service/PersonService.php	Extends getAll() signature to accept search query + limit and forwards to repository.
backend/src/Repository/PersonRepository.php	Implements query filtering + max results for person search.
backend/src/Controller/Api/PersonApiController.php	Returns [] when q is missing; applies q/limit search; busts + warms avatar caches on upload.
backend/src/Service/AvatarCacheService.php	Adds centralized LiipImagine avatar cache bust/warm-up helpers.
backend/src/Entity/Person/User.php	Adds __serialize/__unserialize to avoid persisting the full entity graph in session.
backend/src/Entity/Person/Person.php	Reduces max allowed uploaded image dimensions (4096 → 2000).
backend/src/Command/MigratePicturesCommand.php	Removes the already-completed migration command.
backend/src/Command/DeployResetCommand.php	Adds app:deploy-reset to clear sessions and warm avatar caches post-deploy.
backend/config/services.yaml	Registers the new deploy reset command with projectDir argument.
backend/config/packages/liip_imagine.yaml	Switches driver to imagick and forces avatar filters to output WebP.

Comments suppressed due to low confidence (1)

e2e/tests/profile/sponsor-add.spec.ts:55

• Avoid fixed waitForTimeout in e2e tests; it is inherently flaky across CI load/network variance. Prefer waiting on a deterministic UI condition (e.g., expect a specific option to appear / expect "Aucun résultat" / wait for the /api/persons?q= response).

    await autocomplete.fill(firstName);

    await page.waitForTimeout(400); // debounce + réseau

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