fix(integration): refresh shared infra on integration switch

`integration switch` previously called _install_shared_infra() with
the default force=False, so vendored scripts under
.specify/scripts/{bash,powershell}/ from a prior install were preserved
even when the new target integration required a newer version.

Concretely, an older update-agent-context.sh that did not list 'pi'
(or any newer agent) in its supported-agent table would silently
override the freshly installed wrapper, producing 'Unknown agent
type ...' errors at command time despite the CLI advertising the
integration.

Pass force=True from integration_switch() so shared infrastructure
is rewritten to the bundled CLI version. User content under specs/
is untouched (shared infra is CLI-version-tied, not user content).

Fixes #2293

Author: Quratulain-bilal

src/specify_cli/__init__.py

@@ -2381,9 +2381,13 @@ def integration_switch(
     if integration_options:
         parsed_options = _parse_integration_options(target_integration, integration_options)
 
-    # Ensure shared infrastructure is present (safe to run unconditionally;
-    # _install_shared_infra merges missing files without overwriting).
-    _install_shared_infra(project_root, selected_script, invoke_separator=target_integration.effective_invoke_separator(parsed_options))
+    # Refresh shared infrastructure to the current CLI version. Switching
+    # integrations is exactly when stale vendored shared scripts (e.g.
+    # update-agent-context.sh that pre-dates the target integration's
+    # supported-agent list) would silently break the new integration, so
+    # always overwrite with the bundled copies. User content lives under
+    # specs/ and is not touched here. See #2293.
+    _install_shared_infra(project_root, selected_script, force=True, invoke_separator=target_integration.effective_invoke_separator(parsed_options))
     if os.name != "nt":
         ensure_executable_scripts(project_root)