CCM-12616: add poetry install to pre.sh

Author: lapenna-bjss

infrastructure/terraform/components/dl/pre.sh

@@ -9,3 +9,5 @@ npm ci
 npm run generate-dependencies --workspaces --if-present
 
 npm run lambda-build --workspaces --if-present
+
+poetry install

lambdas/mesh-poll/pyproject.toml

@@ -3,7 +3,7 @@ name = "mesh-poll"
 version = "0.1.0"
 description = "Poll a MESH mailbox"
 authors = ["Your Name <you@example.com>"]
-package-mode = false
+packages = [{include = "*", from = "src"}]
 
 [tool.poetry.dependencies]
 python = "^3.9"