ci: fix nonexistent actions/upload-artifact SHA pin (Refs standards#48)

[hyperpolymath]

Bulk remediation for hyperpolymath/standards#48.

actions/upload-artifact was pinned to 65c79d7f54e76e4e3c7a8f34db0f4ac8b515c478 which does not exist in actions/upload-artifact, breaking every affected workflow at Set up job. Replaced with the real v4.6.2 SHA ea165f8d65b6e75b540449e92b4886f43607fa02 (the pin already used by the canonical rsr-template-repo / v3-templater generators).

SHA-only replacement; pre-existing version comments left intact (cosmetic).

Refs hyperpolymath/standards#48 — per standards#66 protocol this PR uses Refs (not Closes); joint-close only on explicit agreement.

🤖 Generated with Claude Code

[github-actions]

🔍 Hypatia Security Scan

Findings: 94 issues detected

Severity	Count
🔴 Critical	37
🟠 High	32
🟡 Medium	25

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "reason": "Nickel file missing SPDX-License-Identifier header (1 occurrences, CWE-1104)",
    "type": "ncl_missing_spdx",
    "file": "/home/runner/work/ambientops/ambientops/_pathroot/ncl/lib/schema.ncl",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "medium"
  },
  {
    "reason": "getExn on external data -- use pattern matching (1 occurrences, CWE-754)",
    "type": "getexn_on_external",
    "file": "/home/runner/work/ambientops/ambientops/_pathroot/src/nicaug/NicaugCLI.res",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "getExn on external data -- use pattern matching (1 occurrences, CWE-754)",
    "type": "getexn_on_external",
    "file": "/home/runner/work/ambientops/ambientops/_pathroot/src/nicaug/PlatformOrchestrator.res",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "getExn on external data -- use pattern matching (7 occurrences, CWE-754)",
    "type": "getexn_on_external",
    "file": "/home/runner/work/ambientops/ambientops/_pathroot/src/Discovery.res",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "expect() in hot path (1 occurrences, CWE-754)",
    "type": "expect_in_hot_path",
    "file": "/home/runner/work/ambientops/ambientops/panoptes/src/ollama.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "medium"
  },
  {
    "reason": "unwrap_or(0) with dangerous default (2 occurrences, CWE-754)",
    "type": "unwrap_dangerous_default",
    "file": "/home/runner/work/ambientops/ambientops/panoptes/src/web/mod.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "unwrap_or(0) with dangerous default (1 occurrences, CWE-754)",
    "type": "unwrap_dangerous_default",
    "file": "/home/runner/work/ambientops/ambientops/personal-sysadmin/src/correlation.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "unwrap() without prior check -- DoS via panic (12 occurrences, CWE-754)",
    "type": "unwrap_without_check",
    "file": "/home/runner/work/ambientops/ambientops/contracts-rust/benches/contracts_bench.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "high"
  },
  {
    "reason": "unwrap_or(0) with dangerous default (3 occurrences, CWE-754)",
    "type": "unwrap_dangerous_default",
    "file": "/home/runner/work/ambientops/ambientops/hardware-crash-team/src/scanner/mod.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  },
  {
    "reason": "unwrap_or(0) with dangerous default (1 occurrences, CWE-754)",
    "type": "unwrap_dangerous_default",
    "file": "/home/runner/work/ambientops/ambientops/clinician/src/correlation.rs",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  }
]

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