fix: replace deprecated testcontainers log waits

[KurodaKayn]

Summary

Fixes #35893

This PR replaces deprecated wait_for_logs usage in Testcontainers-based integration test setup with structured LogMessageWaitStrategy readiness checks.

The readiness checks are now configured on each container before startup for PostgreSQL, Redis, Dify Sandbox, and Dify Plugin Daemon. This removes the DeprecationWarning while preserving the same startup log checks and timeout behavior.

From Codex

Screenshots

Before	After
N/A	N/A

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran make lint && make type-check (backend) and cd web && pnpm exec vp staged (frontend) to appease the lint gods

[github-actions]

Pyrefly Diff

base → PR

--- /tmp/pyrefly_base.txt	2026-05-13 14:58:17.769703506 +0000
+++ /tmp/pyrefly_pr.txt	2026-05-13 14:58:08.237657606 +0000
@@ -633,7 +633,7 @@
 ERROR Argument `_SimpleJinja2Renderer` is not assignable to parameter `jinja2_template_renderer` with type `Jinja2TemplateRenderer` in function `graphon.nodes.template_transform.template_transform_node.TemplateTransformNode.__init__` [bad-argument-type]
   --> tests/integration_tests/workflow/nodes/test_template_transform.py:94:34
 ERROR `dict[str, str | None]` is not assignable to attribute `env` with type `dict[str, str]` [bad-assignment]
-   --> tests/test_containers_integration_tests/conftest.py:204:39
+   --> tests/test_containers_integration_tests/conftest.py:203:39
 ERROR Argument value `Literal[0]` violates Pydantic `ge` constraint `Literal[1]` for field `page` [bad-argument-type]
    --> tests/test_containers_integration_tests/controllers/console/app/test_app_apis.py:663:51
 ERROR Object of class `RequestError` has no attribute `response` [missing-attribute]

[github-actions]

Pyrefly Type Coverage

Metric	Base	PR	Delta
Type coverage	0.00%	43.70%	+43.70%
Strict coverage	0.00%	43.22%	+43.22%
Typed symbols	0	22,021	+22,021
Untyped symbols	0	28,684	+28,684
Modules	0	2551	+2,551

[Copilot]

Pull request overview

Replaces deprecated wait_for_logs calls with structured LogMessageWaitStrategy readiness checks attached via waiting_for(...) before each container's start().

Changes:

• Import LogMessageWaitStrategy instead of wait_for_logs.
• Add _wait_for_log_message helper applying message + startup timeout.
• Configure wait strategies on Postgres, Redis, Dify Sandbox, and Dify Plugin Daemon containers prior to start.

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