Stateful flows (#1931)

* fix: ensure persisted state overrides class defaults

- Remove early return in Flow.__init__ to allow proper state initialization
- Add test_flow_default_override.py to verify state override behavior
- Fix issue where default values weren't being overridden by persisted state

Fixes the issue where persisted state values weren't properly overriding
class defaults when restarting a flow with a previously saved state ID.

Co-Authored-By: Joe Moura <joao@crewai.com>

* test: improve state restoration verification with has_set_count flag

Co-Authored-By: Joe Moura <joao@crewai.com>

* test: add has_set_count field to PoemState

Co-Authored-By: Joe Moura <joao@crewai.com>

* refactoring test

* fix: ensure persisted state overrides class defaults

- Remove early return in Flow.__init__ to allow proper state initialization
- Add test_flow_default_override.py to verify state override behavior
- Fix issue where default values weren't being overridden by persisted state

Fixes the issue where persisted state values weren't properly overriding
class defaults when restarting a flow with a previously saved state ID.

Co-Authored-By: Joe Moura <joao@crewai.com>

* test: improve state restoration verification with has_set_count flag

Co-Authored-By: Joe Moura <joao@crewai.com>

* test: add has_set_count field to PoemState

Co-Authored-By: Joe Moura <joao@crewai.com>

* refactoring test

* Fixing flow state

* fixing peristed stateful flows

* linter

* type fix

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Joe Moura <joao@crewai.com>

src/crewai/memory/storage/kickoff_task_outputs_storage.py

@@ -23,7 +23,7 @@ class KickoffTaskOutputsSQLiteStorage:
     ) -> None:
         if db_path is None:
             # Get the parent directory of the default db path and create our db file there
-            db_path = str(Path(db_storage_path()).parent / "latest_kickoff_task_outputs.db")
+            db_path = str(Path(db_storage_path()) / "latest_kickoff_task_outputs.db")
         self.db_path = db_path
         self._printer: Printer = Printer()
         self._initialize_db()

src/crewai/memory/storage/ltm_sqlite_storage.py

@@ -17,7 +17,7 @@ class LTMSQLiteStorage:
     ) -> None:
         if db_path is None:
             # Get the parent directory of the default db path and create our db file there
-            db_path = str(Path(db_storage_path()).parent / "long_term_memory_storage.db")
+            db_path = str(Path(db_storage_path()) / "long_term_memory_storage.db")
         self.db_path = db_path
         self._printer: Printer = Printer()
         # Ensure parent directory exists