Remediate all lint findings under the canonical golangci-lint config

Fix every finding surfaced by the canonical .golangci.yml with
golangci-lint v2.12.2 (refs #61), behavior-preserving throughout:

- err113: dynamic errors replaced with package-level sentinels and %w
  wrapping; direct comparisons converted to errors.Is
- goprintffuncname: printf-style helpers renamed with an f suffix
  (ui.Writer message methods, cli.ReportErrorf, database.Fatalf,
  vaultik stdoutf) and all call sites updated
- revive: stuttering type names renamed (blob.Handler, blob.WithReader,
  blob.ChunkPosition, storage.URL, storage.Info), doc comments added,
  unused parameters blanked, package comments added
- contextcheck/noctx: ctx threaded through blob.Packer
  (AddChunk/Flush/FinalizeBlob/PackChunks) and scanner call sites;
  context-aware exec and sql variants used
- funlen/cyclop/gocognit/nestif/dupl: oversized or duplicated
  functions split into focused helpers across production and test code
- paralleltest/tparallel/thelper/usetesting/testpackage: tests
  parallelized where safe (global log.Initialize kept in the serial
  phase), helpers marked, t.TempDir adopted, external test packages
  where only exported API is used
- gosec: integer conversions clamped or justified, header timeouts
  added, remaining findings suppressed with per-site justifications
- mnd/goconst/lll/wsl_v5/nlreturn/noinlineerr/errcheck and other
  mechanical findings fixed directly

Remove the deprecated log.LogOptions alias (callers migrated to
log.Options). make check is green.

internal/log/module.go

@@ -5,6 +5,8 @@ import (
 )
 
 // Module exports logging functionality for dependency injection.
+//
+//nolint:gochecknoglobals // fx module definitions are package globals
 var Module = fx.Module("log",
 	fx.Invoke(func(cfg Config) {
 		Initialize(cfg)
@@ -12,12 +14,12 @@ var Module = fx.Module("log",
 )
 
 // New creates a new logger configuration from provided options.
-func New(opts LogOptions) Config {
+func New(opts Options) Config {
 	return Config(opts)
 }
 
-// LogOptions are provided by the CLI.
-type LogOptions struct {
+// Options are provided by the CLI.
+type Options struct {
 	Verbose bool
 	Debug   bool
 	Cron    bool