docs(specs): make the profile version fix the protocol parameters

[xgreenx]

The Canonical Runtime derives a proof's expiry from the profile version it ran, so one version must mean one value on every chain and through every verifier upgrade. Spec side of libid-org/libID-contracts#65; the contracts implementation lands in a separate libID-contracts PR.

Changes

• Protocol parameters (libid.md): per-profile table; ("x", 1) and ("github", 1) fix proofLifetime 3600 and maxFutureAttestationSkew 300, ("google", 1) names neither.
• REQ-PARAM-01: the profile fixes each value, the verifier exposes no setter, governance cannot change it, and a new value takes a new Platform Ceremony Version.
• REQ-PARAM-02, TEST-PARAM-01: the verifier uses its profile's value; the test covers chains, Verifier Versions and upgrades.
• Ceremony boundary: the Platform Ceremony Version and Platform Profile terms, common §5 and platform §2 include the values, so REQ-COMMON-01B bumps the version on a change.
• Governance scope: trust model, principal table, Verifier Governance Process term and common §5.1 list no parameters.
• Per-profile skew: ASM-NOTARY-01, REQ-COMMON-26, platform §2.2, REQ-PLAT-09, §7 and TEST-PLAT-07 read the profile's value.
• Security considerations: the window is the profile's; governance can end acceptance early by retiring a trust root or Verifier Version.

Verified

• lint_spec.py: the same findings on main and on this branch; 0 errors and 7 warnings over the three specs, 80 and 93 over all five.

Not verified / known issues

• The contracts subtract a per-profile future observation allowance from evidence time; the spec does not define it (pre-existing gap).
• docs(specs): establish protocol terminology #19 (draft) rewrites this section with governance-owned values and will conflict.

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