ci: auto-bump provider package server-ai dep on release

Configure release-please to keep the provider packages' lower bound on
launchdarkly-server-sdk-ai in sync with the most-recently-released
server-ai version, so a langchain/openai provider release can never ship
with a lower bound that resolves to a server-ai version missing symbols
the provider imports.

The server-ai package's `extra-files` now also targets the langchain and
openai pyproject.toml files. An inline `# x-release-please-version`
annotation on the dependency line lets the Generic updater rewrite the
pinned version on each server-ai release without touching the rest of
the file.

Also bumps the lower bound from `>=0.19.0` to `>=0.20.0` to fix the
already-broken bound: provider versions 0.7.0 (langchain) and 0.6.0
(openai) import `AIGraphMetrics`, which only exists in
launchdarkly-server-sdk-ai >=0.20.0 (renamed from `GraphMetrics`).

Author: jsonbailey

packages/ai-providers/server-ai-langchain/pyproject.toml

@@ -20,7 +20,7 @@ classifiers = [
     "Topic :: Software Development :: Libraries",
 ]
 dependencies = [
-    "launchdarkly-server-sdk-ai>=0.19.0",
+    "launchdarkly-server-sdk-ai>=0.20.0", # x-release-please-version
     "langchain-core>=1.0.0",
     "langchain>=1.0.0",
 ]

packages/ai-providers/server-ai-openai/pyproject.toml

@@ -20,7 +20,7 @@ classifiers = [
     "Topic :: Software Development :: Libraries",
 ]
 dependencies = [
-    "launchdarkly-server-sdk-ai>=0.19.0",
+    "launchdarkly-server-sdk-ai>=0.20.0", # x-release-please-version
     "openai>=1.0.0",
 ]
 

release-please-config.json

@@ -9,7 +9,9 @@
       "include-v-in-tag": false,
       "extra-files": [
         "src/ldai/__init__.py",
-        "PROVENANCE.md"
+        "PROVENANCE.md",
+        "/packages/ai-providers/server-ai-langchain/pyproject.toml",
+        "/packages/ai-providers/server-ai-openai/pyproject.toml"
       ],
       "component": "launchdarkly-server-sdk-ai"
     },