Refactor authentication system: centralize credential handling in Builder

Major architectural improvement to eliminate duplicate credential embedding
and simplify authentication logic across the codebase.

Changes:
- Builder now generates all URL variants with proper authentication upfront
  * RTSP: generates URLs with embedded credentials and without (for open cameras)
  * HTTP/JPEG/MJPEG: generates variants with query params and for Basic Auth
- Tester simplified to only test ready-to-use URLs without modification
  * Removed auth chain logic and multiple authentication method attempts
  * Removed AuthMethod enum and related complexity
  * Credentials automatically extracted from URLs when needed
- Scanner cleaned up by removing embedCredentialsInURL function
  * All TestStream calls now use single URL parameter
  * Removed AuthMethod from DiscoveredStream model

Benefits:
- Eliminates bug where credentials were added up to 3 times
- Centralizes all URL generation logic in one place (Builder)
- Cleaner, more maintainable code with clear separation of concerns
- Reduces complexity by ~200 lines of code
- All authentication scenarios still fully supported

.goreleaser.yaml

@@ -0,0 +1,112 @@
+# GoReleaser configuration for Strix
+version: 2
+
+before:
+  hooks:
+    - go mod tidy
+    - go mod download
+
+builds:
+  - id: strix
+    main: ./cmd/strix/main.go
+    binary: strix
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+      - arm
+    goarm:
+      - "7"
+    ignore:
+      - goos: windows
+        goarch: arm
+      - goos: darwin
+        goarch: arm
+    ldflags:
+      - -s -w
+      - -X main.Version={{.Version}}
+      - -X main.BuildDate={{.Date}}
+      - -X main.GitCommit={{.ShortCommit}}
+
+archives:
+  - id: strix-archive
+    format: tar.gz
+    name_template: >-
+      {{ .ProjectName }}_
+      {{- .Version }}_
+      {{- .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else if eq .Arch "386" }}i386
+      {{- else }}{{ .Arch }}{{ end }}
+      {{- if .Arm }}v{{ .Arm }}{{ end }}
+    format_overrides:
+      - goos: windows
+        format: zip
+    files:
+      - README.md
+      - LICENSE
+      - webui/**/*
+      - cameras/**/*
+
+checksum:
+  name_template: 'checksums.txt'
+  algorithm: sha256
+
+changelog:
+  sort: asc
+  use: github
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
+      - '^chore:'
+      - typo
+  groups:
+    - title: '🚀 Features'
+      regexp: '^.*?feat(\([[:word:]]+\))??!?:.+$'
+      order: 0
+    - title: '🐛 Bug Fixes'
+      regexp: '^.*?fix(\([[:word:]]+\))??!?:.+$'
+      order: 1
+    - title: '📝 Documentation'
+      regexp: '^.*?docs(\([[:word:]]+\))??!?:.+$'
+      order: 2
+    - title: '🔧 Other'
+      order: 999
+
+release:
+  github:
+    owner: eduard256
+    name: Strix
+  draft: false
+  prerelease: auto
+  name_template: "v{{.Version}}"
+  header: |
+    ## 🦉 Strix v{{.Version}}
+
+    Smart IP Camera Stream Discovery System
+
+    ### Installation
+
+    Download the appropriate binary for your platform below and extract it.
+
+    ### Usage
+
+    ```bash
+    ./strix
+    ```
+
+    Then open http://localhost:4567 in your browser.
+
+  footer: |
+    **Full Changelog**: https://github.com/eduard256/Strix/compare/{{ .PreviousTag }}...{{ .Tag }}
+
+snapshot:
+  name_template: "{{ incpatch .Version }}-next"
+
+dist: dist