fix(typing): make Provider.boot() pattern static-analysis clean

[tmgbedu]

What

Makes the standard provider boot() pattern pass basedpyright/pyright with no reportUnknownMemberType / Application[Unknown] diagnostics. Target snippet:

from typing import override
from fastapi_startkit.fastapi import FastAPIProvider as BaseFastAPIProvider
from fastapi.templating import Jinja2Templates

class FastapiProvider(BaseFastAPIProvider):
    @override
    def boot(self):
        templates_dir = self.app.use_base_path("resources/templates")
        self.app.bind("templates", Jinja2Templates(directory=str(templates_dir)))
        super().boot()
        from routes.api import api
        self.app.fastapi.include_router(api)

Root cause

Application is Generic[TConfig], but the Provider base class annotated its app attribute as the bare, unparameterized Application. Static analyzers resolved that to Application[Unknown], and the Unknown cascaded into every self.app.* access (.fastapi, .use_base_path, .include_router). Separately, Container.bind had no signature, so self.app.bind(...) and its result were reported as partially unknown.

Changes

• Provider: type app (and the __init__ param) as Application[AppConfig] — the concrete base config bound to TConfig. self.app now resolves to Application[AppConfig], clearing the cascade. Import is under TYPE_CHECKING only, so no runtime/import-cost change.
• Container.bind: explicit signature (name: str, class_obj: Any) -> None. Per direction, bind no longer returns self — nothing chained on it (verified across framework, application/ template, and example/), so callers can write self.app.bind(...) directly with no unused-result to capture.
• Test: updated the container test to assert the new None contract.

Verification

• basedpyright-equivalent (pyright --typeCheckingMode strict) on the target snippet: 0 errors, 0 warnings. reveal_type(self.app) → Application[AppConfig]; self.app.bind(...) → None.
• pytest --ignore=tests/masoniteorm/postgres: 1981 passed, 7 skipped.
• ruff check + ruff format --check: clean.

Coordination

Complements the related typing work rather than duplicating it:

• #1086 (Router.include_router) — completed.
• PR fix(typing): give Application.include_router a fully-known signature #181 / #1093 (Application.include_router signature) — untouched here; this PR fixes the receiver type (self.app), that PR fixes the method's own kwargs. They compose.
• #1225 (self.app -> Application[Unknown]) — this PR delivers that root-cause fix as part of the broader boot() cleanup; flagging for the PM to dedupe/close #1225 against this.

No runtime behavior change beyond Container.bind no longer returning self (an intentional, requested API tweak).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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