fix: inaccruate 401 & sql busy error (#679)

* fix inaccruate 401 error on SQL db error

* init golangci-lint config

* linter autofix

* testify auto fixes

* fix sqlite busy errors

* fix naming

* more linter errors

* fix rest of linter issues

Former-commit-id: e8449b3a7363a6cfd5bc6151609e6d2d94b4f7d8

backend/.golangci.yml

@@ -0,0 +1,73 @@
+run:
+  timeout: 10m
+  skip-dirs:
+    - internal/data/ent.*
+linters-settings:
+  goconst:
+    min-len: 5
+    min-occurrences: 5
+  exhaustive:
+    default-signifies-exhaustive: true
+  revive:
+    ignore-generated-header: false
+    severity: warning
+    confidence: 3
+  depguard:
+    rules:
+      main:
+        deny:
+          - pkg: io/util
+            desc: |
+              Deprecated: As of Go 1.16, the same functionality is now provided by
+              package io or package os, and those implementations should be
+              preferred in new code. See the specific function documentation for
+              details.
+  gocritic:
+    enabled-checks:
+      - ruleguard
+  testifylint:
+    enable-all: true
+  tagalign:
+    order:
+      - json
+      - schema
+      - yaml
+      - yml
+      - toml
+      - validate
+linters:
+  disable-all: true
+  enable:
+    - asciicheck
+    - bodyclose
+    - depguard
+    - dogsled
+    - errcheck
+    - errorlint
+    - exhaustive
+    - exportloopref
+    - gochecknoinits
+    - goconst
+    - gocritic
+    - gocyclo
+    - goprintffuncname
+    - gosimple
+    - govet
+    - ineffassign
+    - misspell
+    - nakedret
+    - revive
+    - staticcheck
+    - stylecheck
+    - tagalign
+    - testifylint
+    - typecheck
+    - typecheck
+    - unconvert
+    - unused
+    - whitespace
+    - zerologlint
+    - sqlclosecheck
+issues:
+  exclude-use-default: false
+  fix: true