feat(azure): allow reusing existing Storage Account via storageAccountName param

- infra.bicep: add storageAccountName param (empty = auto-generate
  '${projectName}store'); effectiveStorageAccountName var resolves the
  final name; Bicep reconciles the existing account idempotently without
  touching other file shares (caddydata, neo4jdata, etc.)
- 1-infra.sh: forward STORAGE_ACCOUNT_NAME (optional) to Bicep
- config.sh.example: document Opció A (existing account, e.g. stgraphiti16852)
  vs Opció B (new account); clarify which vars are inputs vs outputs of 1-infra.sh

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

azure/1-infra.sh

@@ -88,6 +88,7 @@ INFRA_OUTPUT=$(az deployment group create \
       postgresAdminPassword="$POSTGRES_ADMIN_PASSWORD" \
       postgresAdminUser="${POSTGRES_ADMIN_USER:-mirofish}" \
       postgresSku="${POSTGRES_SKU:-B_Standard_B1ms}" \
+      storageAccountName="${STORAGE_ACCOUNT_NAME:-}" \
   --output json)
 
 # Extreure outputs del desplegament

azure/config.sh.example

@@ -81,17 +81,22 @@ POSTGRES_ADMIN_USER="mirofish"
 # SKU de PostgreSQL: B_Standard_B1ms (dev/test) | GP_Standard_D2s_v3 (producció)
 POSTGRES_SKU="B_Standard_B1ms"
 
-# ── Storage (generats per 1-infra.sh — afegir després d'executar-lo) ─────────
+# ── Storage ───────────────────────────────────────────────────────────────────
+# Opció A — Compte existent (ex: stgraphiti16852 que ja té caddydata, neo4jdata)
+#   Deixar STORAGE_ACCOUNT_NAME amb el nom del compte existent.
+#   1-infra.sh el reconciliarà sense esborrar els shares existents.
+# Opció B — Compte nou (1-infra.sh el crea automàticament com a ${PROJECT_NAME}store)
+#   Deixar STORAGE_ACCOUNT_NAME buit.
+STORAGE_ACCOUNT_NAME="stgraphiti16852"   # canvia o deixa buit per crear-ne un de nou
+
+# Nom del File Share per a MiroFish (es crea si no existeix)
+FILE_SHARE_NAME="mirofish-uploads"
+
+# ── Storage (valors generats per 1-infra.sh — afegir-los després d'executar-lo) ─
 # Connection string d'Azure Files (output de 1-infra.sh)
 # Format: DefaultEndpointsProtocol=https;AccountName=...;AccountKey=...;EndpointSuffix=core.windows.net
 STORAGE_CONNECTION_STRING="<output-de-1-infra.sh>"
 
-# Nom del Storage Account (output de 1-infra.sh)
-STORAGE_ACCOUNT_NAME="<output-de-1-infra.sh>"
-
-# Nom del File Share (per defecte: mirofish-uploads)
-FILE_SHARE_NAME="mirofish-uploads"
-
 # DATABASE_URL PostgreSQL (output de 1-infra.sh)
 # Format: postgresql+psycopg2://mirofish:<password>@<host>/mirofish?sslmode=require
 DATABASE_URL="<output-de-1-infra.sh>"

azure/infra.bicep

@@ -26,6 +26,12 @@ param postgresAdminUser string = 'mirofish'
 @description('SKU de PostgreSQL (B_Standard_B1ms per dev; GP_Standard_D2s_v3 per pro)')
 param postgresSku string = 'B_Standard_B1ms'
 
+@description('Nom del Storage Account existent (o buit per crear-ne un de nou: ${projectName}store)')
+param storageAccountName string = ''
+
+// Nom efectiu: el paràmetre si s'especifica, sinó el nom generat
+var effectiveStorageAccountName = empty(storageAccountName) ? '${replace(projectName, \'-\', \'\')}store' : storageAccountName
+
 // ─── Azure Container Registry ─────────────────────────────────────────────────
 resource acr 'Microsoft.ContainerRegistry/registries@2023-01-01-preview' = {
   name: '${projectName}acr'
@@ -65,9 +71,10 @@ resource envStorage 'Microsoft.App/managedEnvironments/storages@2023-05-01' = {
 // Azure Files és necessari per a:
 //   - uploads/simulations/  (SQLite DBs, JSONL, IPC files de les simulacions OASIS)
 //   - uploads/projects/     (fitxers pujats per l'usuari)
-// Standard LRS: suficient per a escenaris non-HA
+// Si storageAccountName apunta a un compte existent, Bicep el reconcilia sense
+// esborrar els File Shares existents (caddydata, neo4jdata, etc.).
 resource storageAccount 'Microsoft.Storage/storageAccounts@2023-01-01' = {
-  name: '${replace(projectName, '-', '')}store'  // sense guions, màx 24 chars
+  name: effectiveStorageAccountName
   location: location
   sku: { name: 'Standard_LRS' }
   kind: 'StorageV2'