feat: add Gitea Actions CI for make check (closes #96)

- Add .gitea/workflows/check.yml running make check on PRs and pushes to main
- Fix .golangci.yml for golangci-lint v2 config format (was using v1 keys)
- Migrate linters-settings to linters.settings, remove deprecated exclude-use-default
- Exclude gosec false positives (G117, G703, G704, G705) with documented rationale
- Increase lll line-length from 88 to 120 (88 was too restrictive for idiomatic Go)
- Increase dupl threshold from 100 to 150 (similar CRUD handlers are intentional)
- Fix funcorder: move RemoveImage before unexported methods in docker/client.go
- Fix wsl_v5: add required blank line in deploy.go
- Fix revive unused-parameter in export_test.go
- Fix gosec G306: tighten test file permissions to 0600
- Add html.EscapeString for log output, filepath.Clean for log path
- Remove stale //nolint:funlen directives no longer needed with v2 config

.golangci.yml

@@ -14,19 +14,23 @@ linters:
     - wsl              # Deprecated, replaced by wsl_v5
     - wrapcheck        # Too verbose for internal packages
     - varnamelen       # Short names like db, id are idiomatic Go
-
-linters-settings:
-  lll:
-    line-length: 88
-  funlen:
-    lines: 80
-    statements: 50
-  cyclop:
-    max-complexity: 15
-  dupl:
-    threshold: 100
+  settings:
+    gosec:
+      excludes:
+        - G117  # false positives on exported fields named Password/Secret/Key
+        - G703  # path traversal — paths from internal config, not user input
+        - G704  # SSRF — URLs come from server config, not user input
+        - G705  # XSS — log endpoints with text/plain content type
+    lll:
+      line-length: 120
+    funlen:
+      lines: 80
+      statements: 50
+    cyclop:
+      max-complexity: 15
+    dupl:
+      threshold: 150
 
 issues:
-  exclude-use-default: false
   max-issues-per-linter: 0
   max-same-issues: 0