HγC P4: Limited Integration Pressure after Boundary-Clarified Comparison

P1 established bounded comparison between the boundedly closed Track A galactic object and the Track B projected-profile morphology object. P2 showed that the comparison cannot remain morphology-blind, and P3 clarified its boundary into continuity-bearing support, admissibly subordinate residue, and contained local tension. This paper develops the restricted problem that becomes visible after P3: when recurrent contained tension may become a reviewable limited-integration-pressure object. P4 imposes two gates before such pressure can be assessed. The comparison-object identity gate blocks scalar shortcut: the same scalar output does not establish the same object, structure, readiness, or integration. The accumulation-channel status gate blocks channel shortcut: apparent coexistence or gamma-difference must first be tested as single-A regime, projection, temporal, observational, or comparison-scope variation before any A_i multiplication or stronger channel reading. A boundary-clarified comparison field generates limited integration pressure only where bounded comparison remains valid but no longer fully sufficient, recurrent contained tension persists under declared identity and channel status, weaker readings are insufficient, and integration remains withheld. The output is a typed and routable pressure record, not synthesis. A worked Bullet-type dissociative cluster-merger case demonstrates the instrument by routing the principal tension to EDM receive-side review rather than inflating it into P-line integration pressure or an HγC explanatory claim.