feat: operational tooling — signing, versioning, changelog, roadmap (SPEC-001)

Establish GuruConnect's release engineering and project tracking (SPEC-001):
- docs/ scaffold: FEATURE_ROADMAP, ARCHITECTURE_DECISIONS (ADR-001 standalone+contract,
  ADR-002 Gitea Actions + Azure Trusted Signing), docs/specs/SPEC-001, CHANGELOG.
- .gitea/workflows/release.yml: conventional-commit auto-versioning, git-cliff changelog,
  Windows agent build, Azure Trusted Signing via jsign (reusing the shared ACG cert profile),
  Gitea release via REST API. build-and-test.yml is the PR/push gate; deploy.yml de-duplicated.
- server: GET /api/changelog/:component/:version (latest + by-version), path-traversal hardened.
- cliff.toml; server/.env.example documents CHANGELOG_DIR.

Reviewed (Code Review Agent): axum route-conflict blocker fixed; CHANGELOG ordering, toolchain
target, breaking-change parsing, empty-changelog fallback addressed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cliff.toml

@@ -0,0 +1,84 @@
+# git-cliff configuration for GuruConnect
+# Conventional-commits preset, grouped by feat / fix / perf.
+# Used by .gitea/workflows/release.yml to generate CHANGELOG.md and per-component changelogs.
+# Docs: https://git-cliff.org/docs/configuration
+
+[changelog]
+# Header rendered once at the very TOP of CHANGELOG.md. The release workflow regenerates the
+# whole file over full history with `--output`, so this fixed preamble is always the first thing
+# in the document, above the newest version block.
+header = """
+# Changelog
+
+All notable changes to GuruConnect are documented here. Format follows
+[Keep a Changelog](https://keepachangelog.com/); the project uses semantic versioning.
+
+Per-version entries below are generated from conventional commits (`feat:`, `fix:`, `perf:`)
+by the release workflow; per-component changelogs are also written to
+`changelogs/<component>/v<version>.md` and served at `/api/changelog/...`.
+"""
+
+# Body template for each release. Designed to render a single version block that the workflow
+# reuses verbatim (via `--strip header`) for the per-component changelog files.
+body = """
+{% if version %}\
+## [{{ version | trim_start_matches(pat="v") }}] - {{ timestamp | date(format="%Y-%m-%d") }}
+{% else %}\
+## [Unreleased]
+{% endif %}\
+{% for group, commits in commits | group_by(attribute="group") %}
+### {{ group | upper_first }}
+{% for commit in commits %}
+- {{ commit.message | upper_first }}{% if commit.id %} ({{ commit.id | truncate(length=8, end="") }}){% endif %}\
+{% endfor %}
+{% endfor %}\n
+"""
+
+trim = true
+
+# Footer rendered once at the BOTTOM of CHANGELOG.md, after the newest-first version blocks. The
+# initial [0.1.0] release predates conventional-commit history and cannot be re-derived from the
+# git log, so it is carried here verbatim. Result over full history is:
+#   header (# Changelog preamble) -> [newest .. ] version blocks (newest first) -> [0.1.0] footer.
+footer = """
+## [0.1.0] - 2026-01-18
+
+### Added
+- Initial GuruConnect: Rust agent (DXGI/GDI capture, input injection, native viewer,
+  `guruconnect://` handler), Axum relay server, protobuf-over-WSS transport.
+- Phase-1 security hardening (JWT, Argon2id, rate limiting, security headers, SEC-1..5),
+  systemd units, automated backups.
+"""
+
+[git]
+# Parse commits as conventional commits.
+conventional_commits = true
+filter_unconventional = true
+split_commits = false
+
+# Group commits into changelog sections. Anything not matched is skipped (chores, docs, etc.).
+commit_parsers = [
+    { message = "^feat", group = "Added" },
+    { message = "^fix", group = "Fixed" },
+    { message = "^perf", group = "Performance" },
+    { message = "^revert", group = "Reverted" },
+    { message = "^chore\\(release\\)", skip = true },
+    { message = "^chore: release", skip = true },
+    { message = "^chore", skip = true },
+    { message = "^docs", skip = true },
+    { message = "^test", skip = true },
+    { message = "^ci", skip = true },
+    { message = "^build", skip = true },
+    { message = "^style", skip = true },
+    { message = "^refactor", skip = true },
+    { body = ".*security", group = "Security" },
+]
+
+# Skip release-bump commits so they never appear in the changelog.
+filter_commits = false
+
+# Process tags matching vMAJOR.MINOR.PATCH.
+tag_pattern = "v[0-9]*"
+
+# Sort newest first.
+sort_commits = "newest"