Extract grants models into individual files (gitcoinco#9341)

* create new directory for models, copy over Contribution model

* extract grants models to individual files

* rename relocated_models directory, remove original models directory, add imports, resolve circular dependencies

* extract CLRMatch into separate file

* extract Flag into separate file

* extract MatchPledge to separate file

* extract Donation and PhantomFunding

* extract GrantStat into separate file

* refactor

* extract GrantBrandingRoutingPolicy to separate file

* update migration

* add missing import to MatchPledge, remove imports from __init__.py

* add missing import

* decouple GrantCLRCalculation and move to own file

* extract GrantType to own file

* extract GrantCLR to own file

* add missing import

* refactor, add missing imports

* remove whitespace

* resolve circular dependency

* run 'make fix'

* import changes from gitcoinco#9314

* add try/except to migration file instead of editing migration directly

* refactor

app/grants/models/clr_match.py

@@ -53,4 +53,4 @@ class CLRMatch(SuperModel):
 
     def __str__(self):
         """Return the string representation of a Grant."""
-        return f"id: {self.pk}, grant: {self.grant.pk}, round: {self.round_number}, amount: {self.amount}"
+        return f"id: {self.pk}, grant: {self.grant.pk}, round: {self.round_number}, amount: {self.amount}"

app/grants/models/grant.py

@@ -488,7 +488,7 @@ class Meta:
     )
 
     in_active_clrs = models.ManyToManyField(
-        GrantCLR,
+        "GrantCLR",
         help_text="Active Grants CLR Round"
     )
     is_clr_active = models.BooleanField(default=False, help_text=_('CLR Round active or not? (auto computed)'))
@@ -885,7 +885,6 @@ def save(self, update=True, *args, **kwargs):
 
         self.clr_prediction_curve = self.calc_clr_prediction_curve
         self.clr_round_num = self.calc_clr_round_label
-
         self.search_vector = (
             SearchVector('title', weight='A') + SearchVector('description', weight='B')
         )

app/grants/models/match_pledge.py

@@ -57,4 +57,4 @@ def data_json(self):
 
     def __str__(self):
         """Return the string representation of this object."""
-        return f"{self.profile} <> {self.amount} DAI"
+        return f"{self.profile} <> {self.amount} DAI"

app/grants/models/subscription.py

@@ -554,4 +554,4 @@ def create_contribution(self, tx_id, is_successful_contribution=True):
             successful_contribution(self.grant, self, contribution)
 
         update_grant_metadata.delay(self.pk)
-        return contribution
+        return contribution