fix(parser): parse compound activation conditions

[ntindle]

Summary

• Parse compound activation restriction conditions whose later branches repeat if, such as Activate only if this land entered this turn or if you control a basic land.
• Let source-zone shorthand fragments after or parse as source-zone conditions, such as on the battlefield or in your graveyard.
• Use the shared type-phrase parser for qualified you control a ... restriction conditions so basic land becomes ObjectCount(Land + HasSupertype(Basic), controller You) >= 1 rather than a literal subtype-like string.
• Remove Hidden Lair and Skyblade's Boon from root chore: update coverage stats and badges #28 in docs/parser-misparse-backlog.md.

Root Cause

parse_connector_split split restriction conditions on or, then parsed each fragment as atomic condition text. That failed when Oracle repeated the condition marker on the second branch (or if you control ...) or used source-zone shorthand (or in your graveyard). After the compound parse failed, the fallback atomic parser kept only the first recognized leaf it could scan.

Parse Audit

Focused before/after export covered all 17 root #28 backlog cards:

• Fixer, Techno Terror
• Garenbrig Squire
• Goremand
• Grizzled Wolverine
• Hermit of the Natterknolls
• Hidden Lair
• Highspire Bell-Ringer
• Hurkyl's Final Meditation
• Ichneumon Druid
• MACH-1, Swooping Scoundrel
• Shadowheart, Sharran Cleric
• Skarrgan Hellkite
• Skyblade's Boon
• Tomb Tyrant
• Trade Caravan
• Uthros Research Craft
• Uthros, Titanic Godcore

Raw changed card keys:

• hidden lair
• skyblade's boon

Intentional deltas:

• Hidden Lair: second mana ability restriction changes from SourceEnteredThisTurn only to Or(SourceEnteredThisTurn, ObjectCount(basic land you control) >= 1).
• Skyblade's Boon: activated ability restriction changes from SourceInZone(Graveyard) only to Or(SourceInZone(Battlefield), SourceInZone(Graveyard)).

coverage-parse-diff on the focused exports reported no signature-level card-parse changes, which is expected for this internal activation-condition shape.

Verification

• cargo fmt --all
• ./scripts/check-parser-combinators.sh
• cargo test -p engine --features cli --lib parses_compound_or_if_restriction_fragments -- --nocapture
• cargo test -p engine --features cli --lib parses_compound_source_zone_shorthand -- --nocapture
• cargo test -p engine --features cli --lib restriction_condition -- --nocapture
• target/debug/card-data-validate /tmp/phase-root28-after.json
• target/debug/coverage-parse-diff /tmp/phase-root28-base.json /tmp/phase-root28-after.json --markdown /tmp/phase-root28-diff.md --json /tmp/phase-root28-diff.json
• cargo clippy -p engine --all-targets -- -D warnings
• git diff --check

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Parse changes introduced by this PR

✓ No card-parse changes detected.