fix: resolve all 17 playbook findings (P0–P3)

P0 fixes:
- agent register: upsert by agent_id (no duplicate rows)
- daemon poll-once: extract _gmail_poll_cycle, run synchronously
- garc_core.py: suppress urllib3/googleapiclient DeprecationWarnings

P1 fixes:
- OAuth: detect RefreshError → delete stale token → re-auth flow
- OAuth: scope coverage check before returning valid creds
- ingress: add stale-reset subcommand (reset in_progress > N min)
- sheets: trim-sheet / clean-all — deleteDimension for empty rows
- approval gate: send Gmail notification to GARC_APPROVAL_EMAIL

P2 additions:
- Google Chat: garc-chat-helper.py + garc send chat subcommands
- Service Account: garc auth service-account verify + DWD support
- Audit log: Sheets audit tab + garc audit list + bin/garc async hook
- garc auth revoke: POST /revoke + delete token file
- kg: pagination fix, shell injection fix, garc-kg-query.py
- docs: _doc_insert_text / append_doc / garc drive append-doc

P3 additions:
- Multi-tenant: lib/profile.sh (list/use/add/show/remove/current)
  bin/garc: auto-load profile config.env and token.json
- Google Forms pipeline: garc-forms-helper.py + lib/forms.sh
  garc forms list/responses/watch
- systemd: _daemon_install_service OS-detect → launchd or systemd units
- Python version gate (>=3.10) in bin/garc + pyproject.toml
- garc doctor command for environment diagnostics

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,28 @@
+[build-system]
+requires = ["setuptools>=68", "wheel"]
+build-backend = "setuptools.backends.legacy:build"
+
+[project]
+name = "garc-gws-agent-runtime"
+version = "0.1.0"
+description = "Google Workspace Agent Runtime CLI"
+requires-python = ">=3.10,<3.13"
+dependencies = [
+    "google-api-python-client>=2.100.0",
+    "google-auth>=2.23.0",
+    "google-auth-oauthlib>=1.1.0",
+    "google-auth-httplib2>=0.1.1",
+    "requests>=2.31.0",
+    "pyyaml>=6.0.1",
+    "python-dateutil>=2.8.2",
+    "rich>=13.0.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=7.4.0",
+    "pytest-mock>=3.11.0",
+]
+
+[tool.setuptools.packages.find]
+where = ["scripts"]