ci(workflows): add timeout-minutes to all jobs

[hyperpolymath]

Why

The Hypatia workflow_audit (surfaced in the security-scan comments on #26/#27) flagged missing_timeout_minutes across the repo's GitHub Actions workflows. Without timeout-minutes, a hung job can run up to the 6-hour default, wasting the shared account-wide Actions concurrency pool.

Change

Adds timeout-minutes: 15 to all 20 runs-on jobs across 9 workflows: boj-build, casket-pages, codeql, dogfood-gate, instant-sync, release, rhodibot, scorecard-enforcer, static-analysis-gate.

• Pure additions — 9 files changed, 20 insertions(+), 0 deletions(-); no other workflow logic touched.
• 15 min is a conservative safety cap (every current job completes in well under a minute per CI history); bump per-job later if anything legitimately needs longer.
• Reusable-workflow caller jobs (no runs-on:, e.g. in governance.yml/rust-ci.yml/mirror.yml/secret-scanner.yml/scorecard.yml/hypatia-scan.yml) are intentionally untouched — timeout-minutes belongs in the called workflow there.

Scope note

This clears the missing_timeout_minutes findings only. The scan's other finding types (the 1 critical / 10 high) are unrelated to timeouts and out of scope for this PR — happy to tackle them separately if you want.

Verification (actually run)

• git diff --stat → 9 files, 20 insertions, 0 deletions; each addition is a timeout-minutes: 15 placed as a sibling of a runs-on: line at matching indentation (full diff reviewed).
• Confirmed no pre-existing timeout-minutes in any workflow beforehand (no duplicate YAML keys), and reverted an incidental EOF-newline change so the diff is purely the timeout additions.

CI/workflow hygiene only — no application code or proofs changed.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Y2MWTAqX2x7goVJzjFB4j5

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Generated by Claude Code

[github-actions]

🔍 Hypatia Security Scan

Findings: 35 issues detected

Severity	Count
🔴 Critical	1
🟠 High	10
🟡 Medium	24

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "reason": "Issue in scorecard-enforcer.yml",
    "type": "scorecard_publish_with_run_step",
    "file": "scorecard-enforcer.yml",
    "action": "split_scorecard_publish_job",
    "rule_module": "workflow_audit",
    "severity": "high"
  },
  {
    "reason": "Issue in instant-sync.yml",
    "type": "secret_action_without_presence_gate",
    "file": "instant-sync.yml",
    "action": "peter-evans/repository-dispatch",
    "rule_module": "workflow_audit",
    "severity": "high"
  },
  {
    "reason": "Issue in scorecard.yml",
    "type": "scorecard_wrapper_missing_job_permissions",
    "file": "scorecard.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "high"
  },
  {
    "reason": "Download-and-execute pattern (curl|wget pipe to shell) -- verify integrity before execution (3 occurrences, CWE-494)",
    "type": "shell_download_then_run",
    "file": "/home/runner/work/wokelangiser/wokelangiser/setup.sh",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "high"
  },
  {
    "line": 24,
    "reason": "Secret found: Generic API key",
    "type": "secret_detected",
    "file": "/home/runner/work/wokelangiser/wokelangiser/.envrc",
    "action": "revoke_rotate_and_purge",
    "rule_module": "security_errors",
    "severity": "critical"
  },
  {
    "reason": "Nominal-only SAST in wokelangiser: codeql.yml language matrix contains no language present in the repo and lacks `actions`, so CodeQL records zero results on every commit. Remediation: set the CodeQL matrix to `language: actions`.",
    "type": "StaticAnalysis",
    "file": "/home/runner/work/wokelangiser/wokelangiser",
    "action": "auto_fix",
    "rule_module": "scorecard",
    "severity": "medium",
    "remediation": "Add CodeQL or equivalent SAST workflow.",
    "scorecard_check": "SAST"
  },
  {
    "reason": "1 workflow(s) with tag-pinned (not SHA-pinned) actions in wokelangiser",
    "type": "DependencyPinning",
    "file": "/home/runner/work/wokelangiser/wokelangiser",
    "action": "auto_fix",
    "rule_module": "scorecard",
    "severity": "medium",
    "remediation": "Pin GitHub Actions and Docker base images by SHA hash.",
    "scorecard_check": "Pinned-Dependencies"
  },
  {
    "reason": "Repository has 7 non-main remote branch(es). Policy: single main branch only.",
    "type": "GS007",
    "file": ".",
    "action": "delete_remote_branches",
    "rule_module": "git_state",
    "severity": "medium"
  },
  {
    "reason": "Code scanning (Hypatia): hypatia/workflow_audit/scorecard_wrapper_missing_job_permissions -- Hypatia workflow_audit: scorecard_wrapper_missing_job_permissions -- 19 day(s) old [STALE]",
    "type": "CSA001",
    "file": "scorecard.yml",
    "action": "escalate",
    "rule_module": "code_scanning_alerts",
    "severity": "high"
  },
  {
    "reason": "Code scanning (Hypatia): hypatia/workflow_audit/secret_action_without_presence_gate -- Hypatia workflow_audit: secret_action_without_presence_gate -- 19 day(s) old [STALE]",
    "type": "CSA001",
    "file": "instant-sync.yml",
    "action": "escalate",
    "rule_module": "code_scanning_alerts",
    "severity": "high"
  }
]

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