Refactor to use Caller

[matoszz]

PR requires theopenlane/iam#448 + theopenlane/gqlgen-plugins#166 + theopenlane/entx#251 to be merged first

With the local directives that include these changes, all passing tests and functionality intact:

➜  core git:(feat-caller) task go:testsum:local                    
✓  internal/ent/eventqueue (1.867s)
✓  internal/ent/notifications (1.805s)
✓  internal/ent/interceptors (3.356s)
✓  internal/ent/privacy/rule (6.748s)
✓  internal/ent/schema (8.338s)
✓  internal/ent/validator (8.773s)
✓  internal/entitlements/entmapping (13.414s)
✓  internal/entitlements/reconciler (10.171s)
✓  internal/httpserve/authmanager (2.167s)
✓  internal/graphapi/common (3.61s)
✓  internal/graphsubscriptions (5.151s)
✓  internal/entdb (23.152s)
✓  internal/ent/hooks (25.291s)
✓  internal/httpserve/config (9.362s)
✓  internal/httpserve/handlers/internal/jsonschemautil (cached)
✓  internal/httpserve/handlers/test_webfinger (cached)
✓  internal/integrations (cached)
✓  internal/integrations/providers/schematest (cached)
✓  internal/integrations/activation (619ms)
✓  internal/httpserve/route (4.696s)
✓  internal/httpserve/handlers/scim (6.289s)
✓  internal/integrations/providers/apikey (8.36s)
✓  internal/integrations/providers/awssts (8.499s)
✓  internal/httpserve/server (8.621s)
✓  internal/integrations/providers/aws (10.513s)
✓  internal/integrations/providers/azuresecuritycenter (10.738s)
✓  internal/integrations/providers/github (10.49s)
✓  internal/integrations/providers/microsoftteams (10.724s)
✓  internal/integrations/providers/gcpscc (11.061s)
✓  internal/integrations/providers/slack (11.231s)
✓  internal/httpserve/serveropts (11.9s)
✓  internal/keymaker (10.802s)
✓  internal/mutations (8.617s)
✓  internal/objects (9.3s)
✓  internal/keystore (9.424s)
✓  internal/objects/resolver (6.871s)
✓  internal/objects/store (7.653s)
✓  internal/objects/upload (6.097s)
✓  internal/objects/validators (4.306s)
✓  internal/workflows (4.577s)
✓  internal/workflows/observability (cached)
✓  pkg/domain (cached)
✓  pkg/jsonx (cached)
✓  pkg/catalog (712ms)
✓  pkg/catalog/gencatalog (1.238s)
✓  pkg/celx (3.37s)
✓  pkg/entitlements (4.325s)
✓  pkg/gala (4.733s)
✓  pkg/logx (5.074s)
✓  pkg/logx/consolelog (5.546s)
✓  pkg/mapx (5.83s)
✓  pkg/middleware/cachecontrol (cached)
✓  pkg/middleware/graphapi (cached)
✓  pkg/middleware/impersonation (cached)
✓  pkg/middleware/mime (cached)
✓  pkg/middleware/secure (cached)
✓  pkg/objects (cached)
✓  pkg/objects/storage (cached)
✓  pkg/middleware/ratelimit (cached)
✓  pkg/middleware/auth (4.669s)
✓  pkg/objects/storage/providers/disk (2.48s)
✓  pkg/objects/storage/providers/database (4.049s)
✓  pkg/ssoutils (cached)
✓  pkg/summarizer (cached)
✓  pkg/slateparser (cached)
✓  pkg/objects/storage/proxy (1.642s)
✓  pkg/permissioncache (4.019s)
✓  pkg/objects/storage/providers/s3 (9.238s)
✓  pkg/objects/storage/providers/r2 (23.794s)
✓  internal/workflows/engine (1m15.884s)
✓  internal/httpserve/handlers (2m40.238s)
✓  internal/graphapi (3m47.434s)

=== Skipped
=== SKIP: pkg/summarizer TestLLM_Summarize (0.00s)

DONE 4419 tests, 1 skipped in 268.937s

[sonarqubecloud]

Quality Gate failed

Failed conditions
8.2% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud