bug: we don't need to support very old releases

[johnsaigle]

Use what we currently have as the floor an ignore odler unsupported versions. we only care about new versions being released.

e.g. from new github action logs.

=== Covered Anchor versions ===
0.26.0
0.27.0
0.28.0
0.29.0
0.30.0
0.30.1
0.31.0
0.31.1
0.32.0
0.32.1
1.0.0
1.0.1
1.0.2
1.0.3
1.1.0
1.1.1
1.1.2
=== Fetching releases from coral-xyz/anchor ===
MISSING: 0.25.0 (from coral-xyz/anchor tag v0.25.0)
MISSING: 0.24.2 (from coral-xyz/anchor tag v0.24.2)
MISSING: 0.24.1 (from coral-xyz/anchor tag v0.24.1)
MISSING: 0.24.0 (from coral-xyz/anchor tag v0.24.0)
MISSING: 0.23.0 (from coral-xyz/anchor tag v0.23.0)
MISSING: 0.22.1 (from coral-xyz/anchor tag v0.22.1)
MISSING: 0.22.0 (from coral-xyz/anchor tag v0.22.0)
MISSING: 0.21.0 (from coral-xyz/anchor tag v0.21.0)
MISSING: 0.20.1 (from coral-xyz/anchor tag v0.20.1)
MISSING: 0.20.0 (from coral-xyz/anchor tag v0.20.0)
MISSING: 0.19.0 (from coral-xyz/anchor tag v0.19.0)
MISSING: 0.18.2 (from coral-xyz/anchor tag v0.18.2)
MISSING: 0.18.0 (from coral-xyz/anchor tag v0.18.0)
=== Fetching releases from solana-foundation/anchor ===
MISSING: 0.25.0 (from solana-foundation/anchor tag v0.25.0)
MISSING: 0.24.2 (from solana-foundation/anchor tag v0.24.2)
MISSING: 0.24.1 (from solana-foundation/anchor tag v0.24.1)
MISSING: 0.24.0 (from solana-foundation/anchor tag v0.24.0)
MISSING: 0.23.0 (from solana-foundation/anchor tag v0.23.0)
MISSING: 0.22.1 (from solana-foundation/anchor tag v0.22.1)
MISSING: 0.22.0 (from solana-foundation/anchor tag v0.22.0)
MISSING: 0.21.0 (from solana-foundation/anchor tag v0.21.0)
MISSING: 0.20.1 (from solana-foundation/anchor tag v0.20.1)
MISSING: 0.20.0 (from solana-foundation/anchor tag v0.20.0)
MISSING: 0.19.0 (from solana-foundation/anchor tag v0.19.0)
MISSING: 0.18.2 (from solana-foundation/anchor tag v0.18.2)
MISSING: 0.18.0 (from solana-foundation/anchor tag v0.18.0)
=== Fetching releases from otter-sec/anchor ===
MISSING: 0.25.0 (from otter-sec/anchor tag v0.25.0)
MISSING: 0.24.2 (from otter-sec/anchor tag v0.24.2)
MISSING: 0.24.1 (from otter-sec/anchor tag v0.24.1)
MISSING: 0.24.0 (from otter-sec/anchor tag v0.24.0)
MISSING: 0.23.0 (from otter-sec/anchor tag v0.23.0)
MISSING: 0.22.1 (from otter-sec/anchor tag v0.22.1)
MISSING: 0.22.0 (from otter-sec/anchor tag v0.22.0)
MISSING: 0.21.0 (from otter-sec/anchor tag v0.21.0)
MISSING: 0.20.1 (from otter-sec/anchor tag v0.20.1)
MISSING: 0.20.0 (from otter-sec/anchor tag v0.20.0)
MISSING: 0.19.0 (from otter-sec/anchor tag v0.19.0)
MISSING: 0.18.2 (from otter-sec/anchor tag v0.18.2)
MISSING: 0.18.0 (from otter-sec/anchor tag v0.18.0)
could not add label: 'missing-release' not found

@malaclypsejr

[malaclypsejr]

Opened #13 to address this.

Changes:

• Added MINIMUM_ANCHOR_VERSION = "0.26.0" constant in src/compatibility.rs as the floor — the lowest version the detector supports
• Added minimum_anchor_version() public function so agents can read the floor programmatically
• Updated workflows/sync.md step 3: versions older than the floor are deliberately unsupported and should never be reported as missing. Only versions newer than or equal to the floor get flagged.

The sync agent will now skip all pre-0.26.0 releases from coral-xyz/anchor, solana-foundation/anchor, and otter-sec/anchor.