Fix GlitchTip error-reporting noise + import-smoke CI

[abrichr]

Why

GlitchTip (project openadaptai/openadapt, 3798) was dominated by unactionable import-time crashes from automated/headless environments (bot servers admin123-nexus-*, CI, no-display Linux) running OpenAdapt where it structurally can't run. These flood the dashboard and bury real issues. Triaging all 17 unresolved issues (65 events): ~80% of events are environmental noise, several "top bugs" are already fixed on this branch (pywinauto guarded, no declarative_base(bind=)) and recur only from old-release bots.

What

• error_reporting.before_send_event now drops unsupported-environment errors (no display / $DISPLAY / X connection, wrong platform, No module named 'pywinauto', numpy ABI _ARRAY_API, headless crop_active_window). It also only shows the user alert when a GUI is actually running — previously it popped a QMessageBox on every event inside the Sentry hook (broken/blocking headless).
• config.ERROR_REPORTING_DSN → live project 3798. Previously 8771, which isn't in the org and is unreachable, so its events were never visible in the dashboard.
• CI import-smoke step (main.yml): core modules must import cleanly — the dominant GlitchTip error class (same class as openadapt-ml 0.14.1: multiple broken internal imports prevent serve, train, and demo commands #999). TODO left for a Windows matrix (pywinauto path).
• gitignore *.pem — there was an untracked private key (deploy/omniparser-key.pem) at risk of git add -A.

Validation

Ran the new filter against the 17 live issues: it drops 53/65 events (all the high-volume environmental flood) and keeps the 12-event actionable long tail. At runtime it catches even more (the live hook sees full exception messages).

Not done (deliberate)

• No try/except around posthog/dictalchemy3/click — they're declared deps (partial-install artifacts ≠ code bugs; posthog is subclassed at module scope). The import-smoke CI is the correct guard.
• No numpy<2 pin (harmful in 2026; the one stale ABI error is filtered).

Dashboard

Separately muted (status=ignored) the 7 high-volume noise issues (53 events) via the API — ignored not resolved, since old-release bots would reopen resolved.

🤖 Generated with Claude Code

[abrichr]

Superseded by the main-targeted PR. #1004 targeted the abandoned feat/deploy branch (last touched March 2025); main had removed error reporting entirely in the #960 meta-package refactor, so the fix belongs on main, rebuilt for the new architecture. Closing.